Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f1bd8df5ed8e94…

MALICIOUS

PDF

84.0 KB Created: 2021-07-04 03:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c8dd184ab043e3aa8ca90806c3ba1a9b SHA-1: dfe04b7ba134477ef19f6bd3c6a8abec06dd274d SHA-256: 46f1bd8df5ed8e94b3f2f5681640cca2e52cd31f02a5285809372472fb028f97
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm and a callback phishing lure, likely attempting to trick users into calling a fraudulent number for support or to resolve a fake billing issue. While no scripts were extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites or to initiate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/54212515981.pdf In PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfcd44c706---73383022870.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/zuburu.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/1623998518833277370.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8074bafa73---vudigotabopirikokesot.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/48276791005.pdfIn PDF document text
    • https://anfauglir.com/images/file/siwetotolitepetafosari.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/vatekafesufixado.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/46181561374.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/bf9e1955c6030e49f77912377ace794a/wapenupiwanewajurololel.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/39946295521.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/kulesejiderujej.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/55100041740.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082a3a78d0ae---65447576602.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/2dc4dbe5ddf0f856bccc67202b89ab49/vujorumutifebuzoxubuxizuw.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/37b6835f51d6be18e94978eab625a0af/2820429036.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/40b0072a03ebc43edc64168bf28d9d31/91130574998.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/83051396424.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/12907ea01e76a6eb7d2424cc3dd8a0fe/mazuwalofonabupexora.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/zozazizusesinafakazi.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791c83eb858---ledibupagiwimusi.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1d5f5f8e7---vivumedodivo.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c714b50db8---fopumubosuwe.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/47797134927.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5f0150a39---49148149204.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/48982851299.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/77206934802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+grand+finale+bowser%27s+inside+storyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 10972 bytes
SHA-256: f9c7799017cfd9421e9a2d21650c479391167e7492e41ae2249ec31e19e2ccac
font_01_sfnt_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001129a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129A 17944 bytes
SHA-256: aa1cb0ecda4b2a8127b09a8fdb75e19efb0bf412a1c2085a13d7532506999789

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