Malicious PDF — malware analysis report

Static analysis result for SHA-256 3554e54b758035a1…

MALICIOUS

PDF

89.8 KB Created: 2021-07-16 17:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7da0cda5d4505b2ff79dd7cd2e8f4453 SHA-1: 96a30e27e78174fd4b46e6f9708168153111c390 SHA-256: 3554e54b758035a1dcdd2f7249c766ede0048b11cd5b02f14e31a1509772ec04
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the document's structure and URL patterns strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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.
  • 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://travelstore.tn/userfiles/file/gakegejojizav.pdf
    • https://deltaguvenlik.net/userfiles/file/37894256122.pdf
    • http://www.ecvbrass.ch/user/web/file/rupapemudekobujano.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/9j54mum624h3i46fshf66flb42/topikawuf.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0f386fea8---tezasejimodip.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/084d9dc06b6a76feb810ad39df408df5/jewojirivuwe.pdf
    • https://avflash.nl/upload/files/naxolegitu.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21e9b7c7b---77443404677.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/e672ac259bb4f240a8a8ed126bf70568/32093874679.pdf
    • http://muzeumostrowiec.pl/obrazy/file/bupelujaredigiwogeb.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/7d7d689545cf37382729d1b57d69ab01/daguzutolexeni.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/440s0u6oou1a4dsu856ncis8uc/beses.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/2o2ivmgkq8k1dkacljh87qfirq/77231909669.pdf
    • https://hanomanberjaya.com/contents//files/4000545472.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/rm8aqvbp963qmgst8pebfaoi8u/nagerevizapo.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/deam45j71lhu4uils301oifr10/33913446896.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f109fdf3ce---wavasofagubixe.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/38944963101.pdf
    • http://akcjonariusz.com/UserFiles/file/60867908585.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/898ca525832bf856604211dc6ee5073b/gomaw.pdf
    • https://betenenergy.com/sites/default/files/file/nananadipak.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/j9crdv1uuor435mfhojc9nq9e5/65372828751.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=database+security+and+auditing+hassan+afyouni+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_off0000fb77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 16792 bytes
font_01_sfnt_off00011389.bin
c4f4c8afe098b0dacacd7c0b796e676974486e58907a730662c4e5db18be6bdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11389 16972 bytes
font_02_sfnt_off00013ff2.bin
afb1d478b61596a5fa4857ec7512c41d317f8c1295925e56bea36fd02ddf8239
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF2 11208 bytes