Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3effd5cd8b02aae…

MALICIOUS

PDF

67.6 KB Created: 2021-03-07 05:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6e1f51570d1eea45a4c4084c382b61f SHA-1: 488ca1ad71e35125ebff6bcb7c24c86f3e1c5d89 SHA-256: a3effd5cd8b02aae9f9a97c95e7eeaa348467de3fa8893f9a5f56f5bea221241
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

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
  • 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.
  • 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 https://golowaki.ru/aws?utm_term=toro+personal+pace+mower+repair+manual PDF link annotation
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/7813f0.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/hjgiZCG/special_warfare_operator_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_60379d8ec0f47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_6001b85e7d45f.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/QhihdgO/celebrity_cruises_us_phone_number.pdfIn PDF document text
    • https://mosivupidener.weebly.com/uploads/1/3/1/6/131637589/7832350.pdfIn PDF document text
    • http://hookup757.fun/44674589622tde5h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5fcf5af6abc9a.pdfIn PDF document text
    • http://hallop.xyz/god_of_wonders_lyrics_and_chordsi0jor.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/if1Gie3/96067114850.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/QQgjgdR/strategic_leadership_theories_and_models.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/diibB9i/fluid_wallpaper_iphone_xr_black.pdfIn PDF document text
    • http://obuv-kozha.ru/32025899076q7s95.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/l4igjOs/bogamomomis.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/idATijs/85810346281.pdfIn PDF document text
    • http://helpcontactform.com/jibeloluliwoy5om7.pdfIn PDF document text
    • http://custits.space/2019_ke_audio_songqdrdn.pdfIn PDF document text
    • http://snapchat-alert.com/how_are_you_answer_formaldowmw.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/2fb2251aef.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/fgdhfLe/zombies_defense_mecha_hero_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 5120 bytes
SHA-256: 02ab2cbcd972bf80008b581ea564f80595f9d5ccd24070cacd255fef38164397
font_01_sfnt_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 10252 bytes
SHA-256: 2608f1393b839ec54b73e38b7a249d83450afcef05a9d8c43f77f4815cba0336

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