Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ab67afb116e6d7…

MALICIOUS

PDF

54.6 KB Created: 2021-09-25 05:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ea152c44211ecca28f4dec0889c5abf SHA-1: a557357ebd353a7e64838b4e21e50e14b093e883 SHA-256: 34ab67afb116e6d76996e0576198026093551a1233c882e99edf2f472e2df8ef
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with a clickable action, designed to trick users. While no scripts were explicitly extracted, the presence of numerous embedded URLs, many on disposable domains, suggests an attempt to redirect users to malicious sites. The document's structure and heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8171

Heuristics 5

  • 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 54 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
  • 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://www.gabrielamaciel.net/images/content/file/sebip.pdf In PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/lojutitusi.pdfIn PDF document text
    • http://ks-klinika.ru/ckfinder/userfiles/files/sezobibupiluwusanovanebas.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/difajidigokip.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/95212075107.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/6471658546.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/3fb683995a5ff176bca102db95561b02/3123308157.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b39acbc710---34957514589.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/rinezozusixonowaw.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210911135505.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/41940644881.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/17083378528.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/memirumuse.pdfIn PDF document text
    • http://zenithmetals.com/files/61006544388.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/17816470958.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/32026227502.pdfIn PDF document text
    • https://esperidiaogomes.com/userfiles/files/kekujelorak.pdfIn PDF document text
    • http://calisnt.com/uploads/files/ludofobosasitujixev.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/pevaseduxed.pdfIn PDF document text
    • http://darec.sk/files/files/87990262734.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/32929512032.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/nonifavuwovepopaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=discord+nitro+uncheckedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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