Malicious PDF — malware analysis report

Static analysis result for SHA-256 366e1c77e79c66aa…

MALICIOUS

PDF

83.5 KB Created: 2021-08-30 23:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 44aa779b7d6ac99d240df5e407a138ca SHA-1: e3d983a06ec45c53ffda69c7eeadc105285a57d5 SHA-256: 366e1c77e79c66aa355261bdb926fd36bf1b0a9c40db0aa773e7fe1ef4a259e2
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised or disposable hosting sites, some of which are disguised as legitimate WordPress uploads. The presence of urgency lures suggests a phishing or scam attempt, aiming to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/llod336sscipuef47uqslevab4/jonamuwomezojibutanuw.pdf In PDF document text
    • http://thechelseaff.com/user_uploads/files/gibuduxeloxasuvemibef.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/dolojivavojazitinifisoxaw.pdfIn PDF document text
    • https://pellevah.com/upload/files/68832490524.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/f986f05ffe5e6cec34b4bbd7b33e05d8/17946526540.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0ac077d53c45666be26a1b64136267da/vewaneb.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/85f6ec48b7455aa4f25b7e8365832f38/bipitarevajibusaxokup.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0bd2803ef---jifixugu.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/67914559819.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9a7daf5ccf967df93ad606d338c18d70/mubamizivisin.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/56281723399.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/tunogekitolorezowixexika.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/97471076333.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/79276262893.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/kegubonobajololamopuwid.pdfIn PDF document text
    • http://cochu.net/resimler/files/44065148358.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607027e882f25---bufitajuzilujugulepat.pdfIn PDF document text
    • http://jx4d.com/userfiles/file/1263784788.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/98477745199.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf8f994670---7957576458.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/natulilofutow.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/jovamasovetiwirawolanokox.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/6f1b7efe9d07a18667e4daff3496530d/46854538244.pdfIn PDF document text
    • http://sbkf.org/files/files/72440388498.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/2578ec7daad3b0206d14074a3deea539/34141871588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=civil+engineering+psc+questions+and+answers+pdfPDF link annotation
    • 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_off0000dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 11224 bytes
SHA-256: ae04791333c08cafe04ece142df7cfc8a20e654c54c527715c6962615ae545c3
font_02_sfnt_off000110fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FC 18212 bytes
SHA-256: ebb552203179c8ace026ab91e50909070f161c234830b09fb47ea84f67931c92