Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe85848d38d1952…

MALICIOUS

PDF

84.8 KB Created: 2021-09-18 00:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a23f30f14c1efcb981d14b6bde143402 SHA-1: cd4870061b500e33f4e88a11c58723789640a0a1 SHA-256: 7fe85848d38d1952f31537fba3747307ce5331ae77310cc973f345573f984d3d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and ML classifiers, and heuristics indicate it is an advance-fee scam lure. The document contains numerous embedded URLs, many of which point to unknown or potentially malicious domains, suggesting an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/22755961474.pdf
    • http://unionnutritech.com/upload/files/kafekewurovew.pdf
    • https://xuantruongtech.com/images/ckeditor/files/lozad.pdf
    • http://koovappadyscb.com/ckfinder/userfiles/files/63117539618.pdf
    • http://abwgulfport.com/uploads/files/70837425630.pdf
    • https://rt-totaalafbouw.nl/userfiles/file/66846582712.pdf
    • https://comobrew.com/newsite/images/user_uploads/file/17562733043.pdf
    • http://xyr59.com/filespath/files/20210906193133.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/18274308214.pdf
    • http://eot.mn/uploads/userfiles/files/gukofepu.pdf
    • http://bkmarine.net/ckfinder/userfiles/files/1631283470.pdf
    • https://airin.lv/images/userfiles/file/12403513032.pdf
    • https://buzascsaba.hu/userFiles/file/72150977188.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613637e3200dd---pakedazigoguvikiruxi.pdf
    • http://centrlita.ru/archive/image/file/94926297670.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ad4ec8a8fac2ac75d209321c440de9b0/83476617970.pdf
    • http://firmen-bekleidung.at/userfiles/file/xivox.pdf
    • https://carpenterstouchnj.supremeroi.com/FCKeditor/file/66244448215.pdf
    • https://shevian.com/images/file/11410415979.pdf
    • http://baocaosuhoatoc.com/luutru/files/buxomidazanorikodura.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+unsync+android+phones
    • http://abcs.umontreal.ca/upload/files/mimuvadopawexazosudoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e668.bin
cf0ada47afa16f00bbc5483fe8a07a93d5623a43d1c89aa4892e34ae39207b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 17620 bytes
font_01_sfnt_off00011489.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11489 16792 bytes
font_02_sfnt_off00012ca0.bin
abe151997fc677dcc6aaeb4b75afee40d0599ee728d6cbeb6ffe1086b6d2a9bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA0 10856 bytes

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