Malicious PDF — malware analysis report

Static analysis result for SHA-256 686c2282f10fe702…

MALICIOUS

PDF

65.6 KB Created: 2020-11-25 17:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec97af77bf01c7d2ca82e1caece67664 SHA-1: 92fcaf253a360b8f75d7ed13c6a6f84bcba6a980 SHA-256: 686c2282f10fe70237528242679924a40650c49d37f58722b7a965fe56f5a5df
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://trafftec.ru/strik?utm_term=harrisonburg+high+school+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f91222da113a.pdfIn PDF document text
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/kifobul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5f97fa3a71c77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8f56f6a09c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_5fb5cb7899790.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/padoragog/mabinogi_beginner_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/icivics_answer_key_the_great_state.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/foxapor.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/45971082643.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/principles_of_musical_acoustics.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/herbalism_guide_sims_4.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_off0000c16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16E 5448 bytes
SHA-256: d07fca6c8fd52f07c64439d233d7a43e003b491450afe2608f3e2794533a6ca2
font_01_sfnt_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 11716 bytes
SHA-256: b70dcb55790623d1fd2be71347874e183d627eb3a015e716b6b12967bc72cc1a