Malicious PDF — malware analysis report

Static analysis result for SHA-256 047316e749a59054…

MALICIOUS

PDF

76.2 KB Created: 2021-09-19 00:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d8afc1fbf4a3ca0a49de979e36060fa3 SHA-1: 2d24ed73bfd75f904ebffeeef15b7390ea63de4e SHA-256: 047316e749a590546f58f504523a38b34276bc0f54b05e633ae0106e4965be43
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. Several embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or redirect users to phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c6c73c4a5---xarifisolarevuwixa.pdf In PDF document text
    • http://kiddeefire.com/media/userfiles/files/femosazeb.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210909100614.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/dbf3929f561c1ee1d991b711249336db/49166989848.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/lipipopo.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/56085775987.pdfIn PDF document text
    • http://szjg.hu/images/file/mogedama.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/tudojavikogikimele.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/42780143882.pdfIn PDF document text
    • https://upaspor.com/resimler/files/67804573022.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136011649a13---nazogikuk.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/kolidusaxakinisusotine.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/jesiw.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/sovovexanov.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/wenejad.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/tixefiparudoruwuwefuzeda.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/61641630188.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/7991976168.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/jejowojesusaxadewotunamud.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/40950714443.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/79639247484.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/putirewiwijumipozatege.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e42cce55b2---26124108119.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/barulifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=relative+pronouns+exercises+with+answers+pdfPDF 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_off0000bfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB7 11116 bytes
SHA-256: c4b6815ce00866a3614b2c23854e58b5ef184543c3409384f5c78aeaf3509d66
font_01_sfnt_off0000d9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 18564 bytes
SHA-256: bbb2f432d5a187dc891b3f5dee322ee8bcfa37b440ed0e90bdcf0541f251cb6d
font_02_sfnt_off00010a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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