Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2df27e2bca22f9…

MALICIOUS

PDF

74.9 KB Created: 2021-03-31 22:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cad235a6697d497995f33a8f37e33692 SHA-1: 75001f118ab71692a67f6f84b62473e4eac63620 SHA-256: 3b2df27e2bca22f95121a21599c104cdd3769871785c8e6092b2869d41bf39cb
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://dafemum.ru/strik?utm_term=easy+crochet+pattern+for+chevron+afghan PDF link annotation
    • https://lizelizana.weebly.com/uploads/1/3/1/4/131409616/424634.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/kitesizuv.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://localdesign.me/samsung_xpress_c480w_toner_not_compatible0din1.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/0a34a5fa954fa5.pdfIn PDF document text
    • https://pifisurap.weebly.com/uploads/1/3/4/1/134108900/natadifatavik_vikubo_fapopir_kujogoje.pdfIn PDF document text
    • http://prizinsta24.space/64523190408xtdig.pdfIn PDF document text
    • https://lalibirubifo.weebly.com/uploads/1/3/0/8/130873838/xukawizuvawinal.pdfIn PDF document text
    • http://perevod24-card2card.site/54110146011hj1ii.pdfIn PDF document text
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/nuxogigog_senelomu.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/bissell_power_steamer_pro_deluxe_instructionsxcviz.pdfIn PDF document text
    • http://septiki-rf.website/7158871079llpfg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_71a08c2e6472440e854392fb4b1fa01b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/firefox_51_for_linux_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/rirovobetefufubotefobuf.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/45076910263.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_b78ba4252b0c452b89c8cebab998eea0.pdf?index=trueIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_3c37d00de884427597428c6fa88cd19b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavalukato/66140735922.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 5364 bytes
SHA-256: 86c5f0b7dc32ba46720188b0f2c0315478418b4ba73a39d96b5154b04bfe2736
font_01_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 11044 bytes
SHA-256: 5ef1b8f7ef09dac7a6797ad57bfd89fa67a824d9f9465dd0ac339b1e224a9a3c

Open this report in the interactive analyzer, or submit your own file for analysis.