Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1646ce71d1cb1e…

MALICIOUS

PDF

59.5 KB Created: 2020-11-10 08:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bdea4ce1c49763fb4d2effc9a65b1cab SHA-1: 91f021b5d83b760c899933da1b9dfd913b5c9d60 SHA-256: 6f1646ce71d1cb1e6495206896731665f8aafda444f5204f3a6e1c392b957862
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 0.9996

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://trafffe.ru/aws?keyword=never+give+up+2+unblocked PDF link annotation
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/5574890.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/c7258f68-aff9-4c45-9ba0-f9175c1ed534/31844986894.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/vibanisiworumij.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/tefifona.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/bygone_bestiary_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/minecraft_cave_update_datapack.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/85068390724.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/30511159798.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/advanced_english_dictionary_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aae9eab-88d9-47a6-8dd1-0dfd02ade948/26747840405.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/tibia_and_fibula_fracture_icd_10_unspecified.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/public_records_property_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/financial_accounting_9th_edition_solution_manual.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_off0000acba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACBA 5220 bytes
SHA-256: eac367f1e5fab84cb745d90a9540ee6771f43c6858bc178d10528e0c424f4140
font_01_sfnt_off0000be9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9B 9860 bytes
SHA-256: 169f691be7a16a4c9213cfcb78e7d5262be2e70f4e502a4e5716ded485bfd7b3