Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3269e4238a411d…

MALICIOUS

PDF

74.9 KB Created: 2021-02-27 09:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f36bced39aba54fe34f7bf9736f3e3c SHA-1: bd57c985e2197aec0289decfdf3e93662b528615 SHA-256: dd3269e4238a411d8d95da83c75d53d3d5320967696e53203582120f1a07ebf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM'. The primary external URL observed is 'https://lozipotod.ru/123?utm_term=how+to+tie+a+double+uni+knot+youtube', which is likely part of a malicious link farm. ClamAV also detected this as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=how+to+tie+a+double+uni+knot+youtube
    • https://berafakeje.weebly.com/uploads/1/3/4/0/134000448/6241665.pdf
    • https://static.s123-cdn-static.com/uploads/4487424/normal_600651382641f.pdf
    • https://cdn-cms.f-static.net/uploads/4402960/normal_602776034c510.pdf
    • https://bubunixijasebed.weebly.com/uploads/1/3/1/4/131407035/doxivafuxerezawati.pdf
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/1d182ca0b13d.pdf
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/pedimiwejejuzusax.pdf
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/d52d6e05db8.pdf
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/togenezon.pdf
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/870501.pdf
    • https://cdn-cms.f-static.net/uploads/4421613/normal_60188b9dece99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gazitif/dofujonur.pdf
    • https://s3.amazonaws.com/tapexiw/69637458740.pdf
    • https://s3.amazonaws.com/bulikowexunepov/payback_2_game_hack_apk.pdf
    • https://s3.amazonaws.com/pivetuzadujo/paige_spiranac_podcast.pdf
    • https://s3.amazonaws.com/zonebon/birdman_movie_tamil_dubbed_free.pdf
    • https://s3.amazonaws.com/kovezux/sopidegoxabo.pdf
    • https://s3.amazonaws.com/tuzamada/73196085180.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e932.bin
964ed70dfbc152f8bdd0cb4d3075707f8ecb23b1572741f3d43e703cb2ab64bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 4904 bytes
font_01_sfnt_off0000fa07.bin
7780f034fe8035b025abedbe5ee46eacd19a28c6f333b297b3f63a6b9ab53f29
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 10812 bytes