Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f498d02f1856667…

MALICIOUS

PDF

97.8 KB Created: 2021-07-07 08:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: caa2b5c3f0cb26f380ecad99ba85e487 SHA-1: 735c24db7fc29e1f23587b5b4f77b930aa2f8bad SHA-256: 5f498d02f1856667c9c7d7670145253e2f24e382d0114a2f457bb0f910f4e438
196 Risk Score

Malware Insights

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

The PDF document is identified as a malicious phishing and advance-fee scam lure. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute further malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://kstarsmall.net/userfiles/file///jomekuzakigupe.pdf
    • http://amirafouad.com/uploaded_files/file/gobila.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607abb83b1506---dusosalamaxewurikugor.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fb7ad6a58---73695608804.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ej9ivanjjucn8go5ln5a7tmri2/bedememuterulefewomijeb.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/f2kgefsfmka6mch6n8airi17cu/10232684549.pdf
    • http://merklink.nl/site/data/ws/files/25147432578.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210621010157.pdf
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/96460221799.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609338c0a78f3---66038283207.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83118166426.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/b43130188133c59f7238e893ee80be4f/wetitero.pdf
    • http://aitrans.cn/UploadFile/file/F1202106211356579322.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/153f497d21bc15f7581951bf3f7b57a7/tadazifopidabisa.pdf
    • https://fanaf.comarticle_ressources/file/47231784554.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7c934479c---57325689682.pdf
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/limunadunokutawuzode.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084b86705e4f---towizudir.pdf
    • https://dermatologie-chamonix.com/userfiles/file/dorurapatepe.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/mekufibadojefagu.pdf
    • http://okmarin.ru/userfiles/file/44440539797.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/fa0ad204cbfe4f7d10850eafacb0cb17/jobolosotafel.pdf
    • http://caythuocdangian.net/images/files/1759557929.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/um6qt1k742tvnb4al7mvdbmjpa/86107922894.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=4+pics+1+word+level+668+answer+7+letters
    • 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_off0001151b.bin
bed6876907f37eb6e3d40669955eef9636de667962c02720dde9f04a78f88076
pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 11116 bytes
font_01_sfnt_off00012f5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5A 16792 bytes
font_02_sfnt_off0001476c.bin
6f007454e361fab900b7d307332ec9ee86c5790099cd83a5640d4d6dfcf21b58
pdf-font-stream PDF embedded font (sfnt) at offset 0x1476C 18660 bytes