Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d242340cd6ed02e…

MALICIOUS

PDF

89.4 KB Created: 2021-10-08 08:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4ea8878b2d11996fcf2a5b4f93b02191 SHA-1: fc8f5e85d9f691801bc97e9732a111746840cdb9 SHA-256: 9d242340cd6ed02e18698f85f93d7c53a10e44e7cf4c869e672c2bd25ea1c96f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. The document body, though heavily obfuscated, contains embedded URLs and is structured as a link farm, suggesting an attempt to redirect users to malicious sites. The heuristic 'SE_CALLBACK_LURE' strongly indicates the document's intent to trick users into making a phone call, likely for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://archism.ru/uplcv?utm_term=cloud+white+3+download PDF link annotation
    • http://someteme.com/archivos/_20210923145357.pdfIn PDF document text
    • http://charivne.info/images/file/sulugodenedibizopax.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/6ru755eb5leveo0nu0bsntcfa1/fumetilufaludob.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/guzipisiji.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/felaxozuzunax.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210927195459.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210908_069F8DC244AD4A09.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/texurofuxexobilexavifow.pdfIn PDF document text
    • https://recrut.com/files/files/vofetilavimav.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/44995752163.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/84347669832.pdfIn PDF document text
    • https://sergiomauri.com/images/file/90394061281.pdfIn PDF document text
    • http://sadrokartonyhk.cz/images/fckfiles/file/jebutezamaterane.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613163634e5b1---sututizozanora.pdfIn PDF document text
    • http://skupka23.ru/upload/m/ditafopejedesisu.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/49440767288.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479f73509d1---67716477453.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/42701270326.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/kmnbpqvrp3evnejofgr214165c/30654603919.pdfIn PDF document text
    • https://motecx.com/images/file/76818466018.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/ruwadumepokunoz.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/64377749074.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/94013774268.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/52246346625.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/naxewefibufisezizi.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/renuzedakufenuzikuku.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_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 16832 bytes
SHA-256: 6571edb42d2c460f6b23add352e7edff8760414a8c421c08c13106923dff0f5f
font_01_sfnt_off000127ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 10464 bytes
SHA-256: 6568c30005bf34f345815e224f9e9e120aae0b318a532041a7f3a39d3c2a7995

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