Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f330a3f61bea7dd…

MALICIOUS

PDF

93.9 KB Created: 2021-07-26 17:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b664a247ecf5cca6760e333ed848cc1 SHA-1: 93d9345e92c8b295a5ab5a247f1e7ffbbd0abec1 SHA-256: 6f330a3f61bea7dde2649e4a8162030e01f1a1316353a21851272750a166ff9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites used for hosting the PDF itself. The presence of a URL with 'autodesk+inventor+professional+2013+crack+free+download' suggests a lure for software piracy, a common phishing tactic. No scripts were extracted, but the structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/bb2d1b80f3fbfd98a148cda832b50852/95316144666.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/599257e385465955360aa896991d5273/37519653091.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3a2cb2dd1---dugefizoped.pdf
    • http://liccuza.ro/stiri_files/file/46575385293.pdf
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30074051960.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/notemibud.pdf
    • https://francois-daulte.com/ckfinder/userfiles/files/tesuwo.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/6d10a197fe67649f913f78932f412e6f/53534888239.pdf
    • http://ubest.ru/images/file/dowimubagoxipojuwuvuxa.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/936b4b199a93b00cb36962ba664b1d32/ganegu.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781eed362c2---dakitomaligego.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/g4n4g92nq6hd0edc91qhn9qih5/vofevozerijef.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea2e474c38---1591316291.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd276e47becd31423d33a7f1d37fc705/52183499162.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/7529367f425693a55f5535b68eb685e5/29685670257.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/3rd5b04lbk9a1ra6s9847uadq2/64713512293.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6c4e516fe---biwadasonexozupumiw.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2915c50cc3---83374040656.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160794bbb56087---18111080048.pdf
    • http://m2m2design.com/userfiles/68840838864.pdf
    • https://genegurumiraclehealer.com/userfiles/file/pavetimufadomubim.pdf
    • https://turkuazhost.com/calisma2/files/uploads/37201612107.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/deb6945a4cab5f977ffe0620882d12be/jobepaguxisiratenoluwiga.pdf
    • http://fxmeat.com/upload/file/7d6ff9b7c1fbad562248cba2b619ba7d.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=autodesk+inventor+professional+2013+crack+free+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa5f.bin
0ac95587870fbe8d060b6872ec15504a5b8dc2f533ad948a11eb0b500d43a5e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 19792 bytes
font_01_sfnt_off00012b3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3A 16792 bytes
font_02_sfnt_off00014351.bin
56e685c9d823e1a1bfc2084032f66c05a90e777e4f430413c95428185845c044
pdf-font-stream PDF embedded font (sfnt) at offset 0x14351 11404 bytes
font_03_sfnt_off00015e86.bin
0d91b93c30cdb4b9fcc5287ef31e0f6d3b75050094e35c3303e90e7f2c1d387e
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E86 2296 bytes