Malicious PDF — malware analysis report

Static analysis result for SHA-256 38846500c59e7dcf…

MALICIOUS

PDF

72.5 KB Created: 2020-11-20 05:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eaf7aaaaeb91e6259fd68162a878385f SHA-1: 9b100940b2d0c96e4e8544ff10099c02eabf23e8 SHA-256: 38846500c59e7dcfc018af1ffac02d33ca6b0d174977fc52b95189fdec64e9b1
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=dystopian+short+stories+ideas PDF link annotation
    • https://gerexogevi.weebly.com/uploads/1/3/4/4/134463414/kebewabofixuvot-figamepesovifab.pdfIn PDF document text
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/8b4a90.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/bozolilote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8c878944c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f920ce9d56ea.pdfIn PDF document text
    • https://putebofodabisig.weebly.com/uploads/1/3/4/3/134368176/da874ecee4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f87af8b166e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5fb71e63df093.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/duvubuluneronad.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/274be01d-9461-44de-9b2a-9a907aa35b77/duwutosixekipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01194eae-af54-4c8d-b796-32609a57d986/76128537926.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_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 5116 bytes
SHA-256: 58e2ce5ff2c751167377d88aeeb138bbad479aa43fa20fab5a5764d8b355c7a5
font_01_sfnt_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 10700 bytes
SHA-256: 1d945968ff148d09c3e5ea35310345cc0815c4cb43a9fda9893c6e9271f6e703