Malicious PDF — malware analysis report

Static analysis result for SHA-256 da32291bef6bfd23…

MALICIOUS

PDF

69.3 KB Created: 2020-11-25 03:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 02dc7e882c1e92205fd724cb2e00230a SHA-1: d2ef6377047e8b366f15f6ec742def624b49a951 SHA-256: da32291bef6bfd239bf2f61eec4fc7a339ed06236dafb0b9fd95c6582598c107
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The 'SE_CALLBACK_LURE' heuristic indicates a potential phishing pretext. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffe.ru/123?utm_term=open+mpx+file+in+project+2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f9f7e4b4e9f4.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/labuvesaxirijepox.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/bujuloza-livagokonafu.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tupexokunodokoz-fogemevanonikiw-gugiwabutilu-lopefetunom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5fa008402dc59.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/debalitomibarokugodu.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/sexilegazafib_revobilokofisor.pdfIn PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/tetun.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/vakelunef-gufev-wepusizaw-siwoxupovones.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/278a4f0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/vigutosolukumijugasixo.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/headline_news_female_reporters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9b277f-206d-4bfa-aa93-7ea8cfbeef4d/zediwewisusezirorite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817ac3fb-7038-475d-b9f8-f631d505e21d/1199243253.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/28657818212.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/btec_business_level_3_book_1.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_off0000d00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00B 5424 bytes
SHA-256: e4f05b2629ab13304e9a1375372edd4b474849b5ff06f3c02e9daf8e24e0d26d
font_01_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 11232 bytes
SHA-256: 58ee7a75408aa985a09831b0925e32a436521b2a2eb0e3cf1795f76c7d7a5706

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