Malicious PDF — malware analysis report

Static analysis result for SHA-256 c908c9ef4f053d44…

MALICIOUS

PDF

73.2 KB Created: 2021-02-14 01:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c7afbdc02302899f1599e7be0098caac SHA-1: 95090556cf5a3004bdfc1d162d619b4239e8a36d SHA-256: c908c9ef4f053d44fc85475f4ff2fc656d102d63c18d5bef2a811899a19e2572
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The embedded URLs point to various domains, including 'bologen.ru' and 'shopwithsale.website', which are likely used to host malicious content or redirect users to phishing sites. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://bologen.ru/123?utm_term=space+heater+keeps+tripping+power+strip PDF link annotation
    • http://shopwithsale.website/general_warranty_deed_texasw6pz6.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/1204834.pdfIn PDF document text
    • https://popiliguji.weebly.com/uploads/1/3/4/2/134265512/kuzuz.pdfIn PDF document text
    • https://selegisazo.weebly.com/uploads/1/3/5/3/135323244/kanodenunakugifogif.pdfIn PDF document text
    • http://womans30planet.com/joribikosijirafudewzokl3.pdfIn PDF document text
    • https://nenefifozotuve.weebly.com/uploads/1/3/0/8/130874038/nulirisefolur.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/gogilijigigijef-bivobelodepofe-firoduwaw-zodilulilisuv.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/fagafujarigulimewozo.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/41da3352.pdfIn PDF document text
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/b6793a.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/fusidejebi/52026702250.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/water_test_kit_for_coliform_bacteria.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/95341113977.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/nemolisejusibowute.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/horrid_henry_book_review_template.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/atrial_septal_defect_nice_guidelines.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_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 5420 bytes
SHA-256: 6ab552c17343ca5ffe50ab7a8cbbaeaa2bfc5b42b5c11594d17f580fb5741952
font_01_sfnt_off0000f33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 10560 bytes
SHA-256: 26c93b1b7cda8ec1f19eee45532908e552a3504089cb1041d0b0e82c5e333f66

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