Malicious PDF — malware analysis report

Static analysis result for SHA-256 216029fff6956ee2…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 18:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d01310301fb910c03eedaa6877a8e418 SHA-1: ff997cbe0dded925ac63e0a86693c976d6d2f9a0 SHA-256: 216029fff6956ee214dd8c2c5082b5b1b69178674c06c716b16c21d744daf161
146 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing attacks, designed to trick users into clicking a malicious link. It redirects to a link farm hosted on disposable domains, increasing the likelihood of malicious intent. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://slovoveri.org/userfiles/zokajo.pdf
    • http://lexxyin.net/files/fckeditor/file/lebuposinegupa.pdf
    • http://destock-groupe.com/userfiles/file/57668566870.pdf
    • http://montoaneli.com/ckfinder/files/mijenebubukuwukeludi.pdf
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/33173174770.pdf
    • http://nilesk.com/userfiles/file/zobojuruko.pdf
    • http://abwcolley.com/uploads/files/bakelaguxu.pdf
    • http://ahppesticide.com/userfiles/file/25079354200.pdf
    • http://fotosvatba.net/userfiles/file/tiridutipasexevukusun.pdf
    • https://philly.drinkpoint.com/uploads/files/rinekobejesuva.pdf
    • http://arucax.am/user_images/file/76449941713.pdf
    • http://paradisoseminatrici.it/userfiles/files/xigove.pdf
    • https://serka.com/serka/upload/files/gironutozurusekogunin.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/buzotisimenoxew.pdf
    • https://evrenmentese.com/upload/ckfinder/files/59077525794.pdf
    • https://homecareangels.ca/files/files/files/37198191040.pdf
    • https://doina.md/fckeditorfiles/file/welatotibukunotikome.pdf
    • http://hepiran.com/cache/fck_files/file/vonutojofi.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e94016066---71951565206.pdf
    • http://circolosilverblufitnessclub.eu/userfiles/files/wowusuwuxupajetenabeliki.pdf
    • http://saikunghouse.hk/userfiles/72748937363.pdf
    • https://moulindelarroque.com/userfiles/file/wetesubiverusuwegujugiw.pdf
    • https://podiummagazinenews.com/ckfinder/userfiles/files/16283099130.pdf
    • https://vegas-shop.net/uploads/files/lokiriv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+honeycomb+features
    • 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_off0000b153.bin
56a053563c46075927fcd2693f6ad724a5895adcd81aabc6c2a07080da152ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB153 13820 bytes
font_01_sfnt_off0000d3b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 16792 bytes
font_02_sfnt_off0000ebcc.bin
2081e3b3ddad7ab871b79cfc97fab74f65d225a03f601725d10b1d6d2169f730		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 11028 bytes

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