Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd708dee8f9709fb…

MALICIOUS

PDF

69.8 KB Created: 2020-12-04 10:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0580836b6fdb05f9fce3d56c946fb1b3 SHA-1: 710d41e6207eb7eab8ced36a5fc23b061dd9c8ba SHA-256: dd708dee8f9709fbf68cf2936ff05a852d76537bdea1143ad6fe7055a0a4e11e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with one pointing to 'traffset.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of techniques used to redirect users to malicious sites.

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://traffset.ru/aws?utm_term=capacitor+voltage+derating+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f9be467ecbd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f9347264fc58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5f9bed68cc863.pdfIn PDF document text
    • https://jinaverew.weebly.com/uploads/1/3/4/2/134235607/widek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5fc91b750c298.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/9941961.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfa2b1972c46e3c652120/1606285868220/12_inch_action_figures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b48893f-78b3-43ef-9250-6e3aeeef9df6/98205607848.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/autocad_underlay_disappears.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8fcbb2-c8f4-4838-b9ee-8f75d24f126f/23711930880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6573eb-b1fb-48b3-a973-dded074de8b4/75273992367.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc101f96609fd0ee791e489/t/5fc1442a9d79364840bc1a9f/1606501419837/norunawobizumavumidusesu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d659d49dd1244740d42e/t/5fc7bec48f079636158648ba/1606926022361/28446478488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91ec5ed-5f59-416d-966f-d498b7754088/skeleton_waiting_for_approval_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/86624220759.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_off0000d222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD222 5208 bytes
SHA-256: 36d1181eb342c0f7b3b98b5a61f3c62b3ad6dd3ae4ceee01b8de825fd0de2f11
font_01_sfnt_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 11352 bytes
SHA-256: e4a9bf798b7eadd0eedd5d61bfc3f92863240e9113631b3dd9526b484824ec57

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