Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2b411c2d5ce829…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 20:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 88532c03a29deab8d077ea4b12f29a63 SHA-1: b48097d12d450e532d224178f10dae773f30604b SHA-256: de2b411c2d5ce829b434fa53912948ee79669063311566d437f2a47e8fc0ef7d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. 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 or callback phishing. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics strongly suggest malicious intent, likely involving the download and execution of further payloads or redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=app+to+make+old+phone+a+security+camera PDF link annotation
    • http://fli.edu.mn/ckfinder/userfiles/files/majenonitanofir.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/745838645.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/ziniledukaxufutagilon.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/40474236012.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/82752163926.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141023da87c4---27086267459.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/ravutiravusilodajurabeju.pdfIn PDF document text
    • http://erpos.sk/data/files/93561593589.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/selulugafepugorakir.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/f179f560f572c6b904d4c05e345ced29/75398039317.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/72325847193.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210914045217.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/noluvagakavufufoma.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/82873331626.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/54553088385.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e332d068c8---zewidaliwufaw.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/d1b9522cc2fb3ba858ef8bf36d02797d/gowofevimu.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/pozojukikopef.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/49684847781.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210902_E8EAF7E398F80719.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/2be3f4311435458aa62c61b9d4b8c364/53369364897.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/68935005810.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/tosenigejowakuzivos.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/70771202921.pdfIn PDF document text
    • 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_off0000e060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE060 11068 bytes
SHA-256: effe6118d41ad1896406ba715a30652310191624e9817cff37067eb7c0734cd5
font_01_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 17212 bytes
SHA-256: 4aea76cd4886897644324a543240de1095b3ed41651c680f4fc48ed625093004

Open this report in the interactive analyzer, or submit your own file for analysis.