Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d293321a26be00…

MALICIOUS

PDF

66.3 KB Created: 2021-05-06 15:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 790b08edcdf349f3803502ea86412eb7 SHA-1: 55d8477dd63d60cba6deaf7ea749aff380f189e6 SHA-256: 15d293321a26be0060312c32deb8655da9f57d5d742c490b55f0bcccec8d313f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9998

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
  • 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
  • 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://pelibifir.ru/strik?utm_term=cuisinart+keurig+coffee+maker+ss+10+manual PDF link annotation
    • https://cdn.sqhk.co/ganuniwiku/wVhhAzF/cara_cheat_dragon_city_game_guardian.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/gzicQOr/vabenir.pdfIn PDF document text
    • https://wikoxunorature.weebly.com/uploads/1/3/5/9/135968981/2523506.pdfIn PDF document text
    • http://polfact.site/531708814740rw1s.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/womaximemoda-talozikevaruze-wofarudimuruj-zasomugenufew.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hfij8jb/12006299732.pdfIn PDF document text
    • https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/2bfc07d5.pdfIn PDF document text
    • http://cardioactiveitalia.site/xomemanz2fnw.pdfIn PDF document text
    • https://tozuriko.weebly.com/uploads/1/3/1/4/131437247/vatoviguze.pdfIn PDF document text
    • https://dirukarizudabi.weebly.com/uploads/1/3/2/3/132303081/silipowe_tozesizafuno_xamukitarow_sozugufisikoram.pdfIn PDF document text
    • http://goodnatural.space/your_beauty_markd7kfl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/39580698705.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/59856131740.pdfIn PDF document text
    • http://vopepajip.epizy.com/21925493384.pdfIn PDF document text
    • http://vudasuluwiviwaj.rf.gd/quarterly_business_review_template_ppt.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31E 5364 bytes
SHA-256: ed8b155b614d58e17e8d6914f601b32dc9dd4903f9b8bed1575eaebc3fe31f21
font_01_sfnt_off0000d554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD554 10848 bytes
SHA-256: 702b4ae79294f870a0db47d481cdbd10e56aa6630dab7cdddad3867077c18742

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