Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf803269cdad5d2…

MALICIOUS

PDF

69.0 KB Created: 2020-12-24 21:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9ea822090afef2931b1f3a6d6c8b531f SHA-1: d5e56915a58e93a5ed2fb6f14cbd39dbb7821954 SHA-256: 7cf803269cdad5d29c3133c92acabfe41dc25bdf6342fe72f51e62482fb361cf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a link farm with numerous external URLs, including one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily garbled, appears to be a lure related to 'federal bureaucracy political cartoon analysis'. No scripts were extracted, but the presence of a link farm and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=federal+bureaucracy+political+cartoon+analysis+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481417/normal_5fdac6f311125.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/lanaxutodi.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/dinemid.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/lupemu_lumivexojadojex_bubufudisujexi_logejilobarug.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/817dc800511e.pdfIn PDF document text
    • https://nixuxani.weebly.com/uploads/1/3/4/4/134433038/juzises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kufazete/23586047793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7331eece-a251-44f1-8372-368d52b3e5a1/35500211911.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/71458970450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029b1714-589d-40e8-9a5a-9c5c453432ae/lomatinawimebor.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/android_sdk_install_ubuntu_14._04.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/gimuravogem.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/6636251231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c821fc2c-6702-4886-bb47-bc9ec83ffa5f/wuzaxedilipot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48F 5236 bytes
SHA-256: cb6ea371d16e599ef502c4168a897cc197d40c5871870971207cef4c51172c60
font_01_sfnt_off0000d670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD670 9976 bytes
SHA-256: 435771d823a101b8716f9b05c39b8817da344f60701ea1f4ac0b8545efbaa94a
font_02_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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