Malicious PDF — malware analysis report

Static analysis result for SHA-256 849280ac9f6904b9…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 09:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 05e09b0aa564e6f22a96860010e8c922 SHA-1: d0b5f042b5c1ed6dab3a89014e1cef65bf291bfd SHA-256: 849280ac9f6904b9e06b056cdc4a289113c90ea17df899d0b3931d0100269bf6
184 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting, suggesting it is part of a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or fraudulent billing schemes. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=naruto+shippuden+ep+144 PDF link annotation
    • http://yonseri.org/userfiles/files/goloxikagoxatofikep.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/gowukegafonezoweg.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210913235051.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d969798e93ba520bee71ba8e0ad6a580/10785633826.pdfIn PDF document text
    • http://wjcopy.com/upload/files/95236639131.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/faroposejodimoxap.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/tezidavozupipuje.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613faec63a0d5---72882587764.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/17093365855.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/tabubejuxawipusapi.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/93805343070.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/62892591639.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210920105159764.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/518581960dbb8907afea824d79039b8a/39209620326.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613639c86dfb2---lavemelu.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/25376913812.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/zazodupapegezu.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/wikikezapojisa.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/60458212470.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/vufuvevilorovewizuwukis.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/tomexujevif.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/20338740647.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109160846297772.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/sokagasotapewarutewe.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/bakesudajusarigufogune.pdfIn PDF document text
    • https://patc.fr/imagesfile/56306900844.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_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 17148 bytes
SHA-256: c187ce9ac1cbec97f9171be259e4b66464b9fde7e9f6ba8a121bb7d357af23c9
font_02_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 10648 bytes
SHA-256: 0fc5ce8286a74bed3445a9919aeeeb7b417f9c9532deddc88d05ee3cd12f11a5

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