Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9dd27a83702042…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 12:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7162b88761dcffbb23fdb4e19ac7d9e8 SHA-1: b2024dd9c9c2e955c49e761677404d34ea0e24ae SHA-256: ac9dd27a837020421773a6658d31d69ee12182152deb85df2952e1c3a1c150ca
186 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or to download further malware.

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/wix?keyword=the+machine+shop+pocahontas+iowa PDF link annotation
    • https://guzoxufogoxuwo.weebly.com/uploads/1/3/4/0/134097696/70c27fea7f81b6c.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/mosinixawgium9.pdfIn PDF document text
    • https://wudowured.weebly.com/uploads/1/3/0/8/130873715/tuduropolemu.pdfIn PDF document text
    • https://xokaxopo.weebly.com/uploads/1/3/2/3/132302824/vigelebumixubek.pdfIn PDF document text
    • https://jevefelenop.weebly.com/uploads/1/3/0/7/130775498/siwiwovutule.pdfIn PDF document text
    • https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/razetafosumowas.pdfIn PDF document text
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/vatuzuset.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/6631122.pdfIn PDF document text
    • http://aov.one/709902655383610x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konasepobave.rf.gd/laburu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/91208835825.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/game_battlefield_4_apk.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_off0000e125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE125 5084 bytes
SHA-256: c3862dbaa2ea71436d37130850b36ef9fa20fc47a50727d54ad9c591dadbd9de
font_01_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 15360 bytes
SHA-256: d0114117304d249d2242f958f2d9839e5017de0e00c4b937174c89bb65002026

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