Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aab512a230839df…

MALICIOUS

PDF

73.8 KB Created: 2021-02-17 00:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 85bb63c55f8df9c1236a5f77e8387bfb SHA-1: 54af3154435a885ecc008d0da9d718cae0948e4e SHA-256: 2aab512a230839dff44d3bf9398f735de5a2d58a922bdd7e09e6f02f8b4e354f
226 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains or link farms themselves. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into believing they need a password to access an archive, a common tactic to bypass gateway security and deliver payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/strik?utm_term=matrox+monarch+hdx+software PDF link annotation
    • https://cdn.sqhk.co/kunimoxifagi/icygghf/42253602924.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/new_cheque_format_sbi.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/de50c.pdfIn PDF document text
    • http://mamontov-net.cc/avon_catalogue_october_2020mo2hw.pdfIn PDF document text
    • http://strapslap.online/advanced_practical_zoologyrjt0i.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/Uhaqjht/economist_login_id_free.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/ejeNoic/69042902706.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/gusonifulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_60151c4bd199b.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/bepivijuwekopurezu.pdfIn PDF document text
    • http://towizekotebe.iblogger.org/44707835764.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/HngjXHz/87578812014.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/8993986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekogufepe.rf.gd/rca_voyager_3_password_reset.pdfIn PDF document text
    • http://litaxuroba.rf.gd/70486440947.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_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5396 bytes
SHA-256: 7ea1cecd44b87f002a70a7d17613a54a6a1b46c602f1a0d9319fc44e1835c7f7
font_01_sfnt_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 10856 bytes
SHA-256: 97b707f5130caa8d92f3f8ef812afd2cd52802ae1bca88ca899da14069ad8a46

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