Malicious PDF — malware analysis report

Static analysis result for SHA-256 179009f0e92a69bb…

MALICIOUS

PDF

75.0 KB Created: 2020-11-16 15:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298307cada3531ea05e8c13768e97e06 SHA-1: 194c54fdf4a1e15951d840cd3310222592ed1e53 SHA-256: 179009f0e92a69bb7e2bb02d1b8e9fa44874e6bf5c95ea8325ed4bbbcb0d25da
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary external URL, https://traffking.ru/123?utm_term=safety+first+ultrasonic+360+humidifier+manual, is likely a phishing lure or a redirect to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=safety+first+ultrasonic+360+humidifier+manual
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5fb25a735fe35.pdf
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f94ded07c6e7.pdf
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/1d0b8c43.pdf
    • https://bowukobi.weebly.com/uploads/1/3/4/7/134706413/xevirezenefu-luvakukob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/satedafadusizo/totitig.pdf
    • https://uploads.strikinglycdn.com/files/eedf0ba5-9b36-4989-9172-e4bc478aed71/50595749477.pdf
    • https://s3.amazonaws.com/lakadutof/citizenship_questions_2020_and_answers_census.pdf
    • https://uploads.strikinglycdn.com/files/df0ef5b5-0375-4f57-9149-1485c3691587/37890535466.pdf
    • https://uploads.strikinglycdn.com/files/63e23712-e10e-4325-b814-f62abc191b58/46337930900.pdf
    • https://s3.amazonaws.com/leributafa/wuvuwoti.pdf
    • https://s3.amazonaws.com/wunupalezozerud/geophysical_research_letters_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/00bd548d-c7bc-473e-a1a6-477d5c95f866/91560911464.pdf
    • https://uploads.strikinglycdn.com/files/d7cea55f-3bc4-4023-aa28-09182fd277f4/89515334923.pdf
    • https://uploads.strikinglycdn.com/files/d80576a3-327a-486b-bc8f-8cacd24c4e3a/luwijixegifezo.pdf
    • https://s3.amazonaws.com/jebupofedijakuk/nucleus_function_organelle.pdf
    • https://s3.amazonaws.com/leguvefu/cheat_codes_gta_5_ps3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e224.bin
d3bbe2dc97b88afe6fff993cb16ae7959cc83f0f28be2651d548a6774942a354
pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 5924 bytes
font_01_sfnt_off0000f623.bin
544b589c7a709d8117abd8d2a38d10e38faf9baf02857ed3c5da7d972559d847
pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 11992 bytes