Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2c20f5f003b1d4…

MALICIOUS

PDF

61.7 KB Created: 2020-11-22 16:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6230d1e9c024e81562b65b699c6e63a2 SHA-1: 15cec23705f53aee4a4815f66436948705eb9fe8 SHA-256: 4e2c20f5f003b1d436d8658c9af6844f0ba89a7a90754b2013336e276d2da054
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 0.9995

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/aws?utm_term=avery+shipping+labels+template+5263 PDF link annotation
    • https://putoluxadap.weebly.com/uploads/1/3/4/7/134734973/zanasuzoguroliwoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5f9b7f686b5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_5f9f6143af144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5fb4ed922af37.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/9285596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5fa1f9e7e64e4.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/f9183378-4c01-4e3c-bc65-4b1ba545a2f0/34705418498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419c01d0-5379-45e5-a0e4-d16b76bf5326/lg_model_lfxs24623s_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/15614368957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40635e4e-d5ec-4a51-ae90-7fac3bf3016a/words_that_start_with_dil.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_off0000b305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB305 6096 bytes
SHA-256: add8afecd0912a6b90bdb75268dc14d2fc06b5f6eb0c4f8fa21c852ac099bcfb
font_01_sfnt_off0000c7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AC 10256 bytes
SHA-256: 74dc391034ee24c39d4731aa118da117d4d6a9d295dbc722219c2bb076fbe3ef