Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a7fa427299d08f…

MALICIOUS

PDF

66.3 KB Created: 2020-11-27 14:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9a0f3546547405469b5aba37a0578e6f SHA-1: d9f156e269728d99b321d39b09a9f2b738dea10d SHA-256: 44a7fa427299d08f296d99fb59ce93160a9ecbf013ef017c53be00899f42137f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/strik?utm_term=tipos+de+figuras+retoricas+en+publicidad PDF link annotation
    • https://luralaxigagu.weebly.com/uploads/1/3/4/8/134868525/pibixepe-pitiwe-pujejagog-luruwuriwirone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f915cb31bee7.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/suwizasunisixi-ninefebawegem-ronoguwatuki-begodubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5fa26a82af342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5f981ad7525fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f973bb437629.pdfIn PDF document text
    • https://pazovazorukilaz.weebly.com/uploads/1/3/4/6/134673506/3126280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445871/normal_5fa7c9f48149e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f873ff322133.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/jadudusujuje/lasermax_guide_rod_laser_92fs.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/algebra_1_eoc_study_guide_florida_answers.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_off0000c54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54D 5412 bytes
SHA-256: f30ccc62e1332a672ee452f63b6560b5f12c45b2f0f4f456963e4bc26709fc0a
font_01_sfnt_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 11420 bytes
SHA-256: 361e5d552c0a139e4ff8d696f20eee03ccbaa00ce7864538fe4cd52495b9b787