Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f8f28c5d1ebff4…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 04:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2eb4d57c01b257715cf810b256db2668 SHA-1: 54329556b7b594766f7bc7a913d483b54c4ab76e SHA-256: d2f8f28c5d1ebff4e8e8931622da964b969056d2baa71dbdfe5c17ef7d8af622
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware hosting sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=poulan+chainsaw+repair+shops+near+me PDF link annotation
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/lolexokege-kofiviwabuju.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/dEWge0G/sadugifarajazasilefivomo.pdfIn PDF document text
    • https://dubakaxejevam.weebly.com/uploads/1/3/2/6/132696109/8523602.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/HhejhBU/bakazufifidegivogasami.pdfIn PDF document text
    • https://laxatutokowo.weebly.com/uploads/1/3/5/3/135387201/botalejesofola.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/Gjj1Zib/56978277653.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/Cgihc40/best_horror_movies_on_netflix_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nigabosepa.epizy.com/tuzilezolipasafafogege.pdfIn PDF document text
    • http://bazevogef.epizy.com/beyonce_songs_free_halo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e4c58f-8be6-4dc2-a3d3-2ad82020b87b/35075315074.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_feaa3f35297f4183b000020b5936720e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/xatimoziwilaveme.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/42832010723.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/hcfa_1500_template_word.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_a0190cef6a3c4107bb66223a60e37537.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cd9bef-4816-4377-8cc3-62e868f3e3cd/64283406690.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_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 5264 bytes
SHA-256: ba9d5878323e183884baaea89f1174da9608600689c55accff6d69f3319414c4
font_01_sfnt_off00010860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 11576 bytes
SHA-256: c146e65c13d09b7adbc59ef07c559b154a82e1e2d8ff2b9133d54c3420ecd54a

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