Malicious PDF — malware analysis report

Static analysis result for SHA-256 e140fbf1d06c1ff4…

MALICIOUS

PDF

69.2 KB Created: 2021-06-10 02:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9a25a9f3ade45c9bc4313f4105632554 SHA-1: 62b955725660ac20ca744aa7918854805a77e4f7 SHA-256: e140fbf1d06c1ff431e041d58dc927328158c61e9ed95cf1b7f4800a08a472f1
186 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 functions as a link farm, containing numerous external URIs, with one prominent example being 'https://infrive.ru/pbw?utm_term=policy+and+procedure+manual+examples'. The presence of many external links on disposable hosting suggests an attempt to manipulate search engine results or direct users to phishing sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/pbw?utm_term=policy+and+procedure+manual+examples PDF link annotation
    • https://gofubemasuxa.weebly.com/uploads/1/3/2/7/132712405/7e25bd535.pdfIn PDF document text
    • https://nosadipopone.weebly.com/uploads/1/3/4/4/134470180/fiwulamexuxo_zenowewa.pdfIn PDF document text
    • https://tepugajir.weebly.com/uploads/1/3/0/8/130874129/3833893.pdfIn PDF document text
    • https://zedunuburow.weebly.com/uploads/1/3/4/0/134042823/9019630.pdfIn PDF document text
    • https://dusemupewujem.weebly.com/uploads/1/3/7/5/137505742/8b35366c7.pdfIn PDF document text
    • https://malotote.weebly.com/uploads/1/3/4/8/134872882/8532720.pdfIn PDF document text
    • https://lefasibemaji.weebly.com/uploads/1/3/4/5/134589759/bujopavuzewedam.pdfIn PDF document text
    • https://movojedafep.weebly.com/uploads/1/3/0/8/130814843/3163926.pdfIn PDF document text
    • https://vavixama.weebly.com/uploads/1/3/4/4/134471840/2243718.pdfIn PDF document text
    • https://puxidijabezidos.weebly.com/uploads/1/3/4/7/134765544/6985591.pdfIn PDF document text
    • https://faxofisokat.weebly.com/uploads/1/3/4/5/134598269/fugopal.pdfIn PDF document text
    • https://xipixipoduk.weebly.com/uploads/1/3/7/5/137501676/kibedodalezaro-vibotitibalu-xadewas.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/f7323f8f-4e14-41d9-8a5b-c3c85d2acc26/41039285611.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144590940/minna_no_nihongo_lesson_16_mondai_answers.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/f/cartuchos_para_impresora_multifuncional_hp_deskjet_f4480.pdfIn PDF document text
    • http://sokulus.pbworks.com/f/36890971404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b3f3b9-5708-4881-9822-48385412e6a6/87991862416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630cd7d8-5f3f-485d-9368-c61055d7fc1e/80739203283.pdfIn PDF document text
    • http://labidan.pbworks.com/f/safesewaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8505b87e-5c15-4ab2-a3ad-cd74d9a5c3ce/jilunetamerujezejotavusax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7926545f-e949-4ff1-8f69-0c66652173ce/60028212928.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_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 5392 bytes
SHA-256: 6cc350ee360529700046a07612a6040dfd48a4d949d95f7d32d5ad9aef5b2096
font_01_sfnt_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 9800 bytes
SHA-256: 7911564cc539f0c4d1dcf44a4fe2571a43feddf3e249dcc4755b32cb5fa5048c