Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d43d0a924028867…

MALICIOUS

PDF

69.9 KB Created: 2020-11-17 23:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 94774f2c22cb247dd24428e2303133c5 SHA-1: 34f9194f2b3e10b2281d353d618085b3d7a13b3a SHA-256: 1d43d0a92402886787185232ee676cf4b5447251330b1bd0562b657c2852373f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://trafficel.ru/123?utm_term=pegasus+shower+faucet+repair', indicates a potential lure related to shower faucet repair, possibly to disguise malicious intent. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful content.

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://trafficel.ru/123?utm_term=pegasus+shower+faucet+repair PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5fb382e2df1c9.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/kukagonuwusanukul.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/vifivaribu_dogegob_xirukowepasopa.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/48a8ea.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/4249825.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/vareriparijajimogot.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/farimodu.pdfIn PDF document text
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/782407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ada017-4a43-457e-824b-7f306b0d9000/pafolejutesifesimexazivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46c50fe-51e7-495e-b038-b31e3d92dd4a/24908477716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6155e517-aecd-4613-823a-90dae7e02448/82507982983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90ddd9c-92cb-48fe-93a9-904a4ed8a895/81180362338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582213ef-feaf-47a9-8d5d-e30209b8f1ee/vibinura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a29afa6-945e-496c-8fc9-243a604fec6d/99930304773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75dba75b-043e-4103-a11a-ec3a5d4b6d27/96510138034.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_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 5336 bytes
SHA-256: 8ecb458e1f327203285c1d5a30a73709c6a3045fbbe8b79f302635620b1ed0e1
font_01_sfnt_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 10288 bytes
SHA-256: a492a3f774ed3171556e7c4683d8b4b40d64df6e0b4aafaa5ea12f2388cb54d1

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