Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7c18d671ee3d07…

MALICIOUS

PDF

68.4 KB Created: 2020-11-09 17:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3f0583b7f496cb99400ccd8fc6b22a26 SHA-1: d802bb9577728acc59177fcdd228904067da4257 SHA-256: 5d7c18d671ee3d070b1e02b416ea4ecd96c3dbd0061c356c1f7ce840ba528e9d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly and other hosting services, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/strik?keyword=rockspace+extender+video PDF link annotation
    • https://janunawavi.weebly.com/uploads/1/3/4/3/134314220/gufigax.pdfIn PDF document text
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/molob-ledivu-getunebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f8fd5a88150b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fa67044a707b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_5fa44d2b5e663.pdfIn PDF document text
    • https://suzokapiwewop.weebly.com/uploads/1/3/4/3/134351383/lawopiludena.pdfIn PDF document text
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/birabe_dofiresim_jujunax_lupoxedupat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_5fa527df355c9.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/75c02bbb-a21f-4bd0-9e7f-3a1d5c412e28/67837849954.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/les_alphas_lecture.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_off0000d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 5232 bytes
SHA-256: dd88c2501ea3a093625ad174dc16741cf78bd485082b5ff7e39b9e859891e39e
font_01_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10368 bytes
SHA-256: d12ad4c299ac021151e63da1e8ecea1382a155f320b8e77d185f79d63eefbb05