Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2545182b4c9027…

MALICIOUS

PDF

70.9 KB Created: 2020-11-10 18:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1bc1934958ac4a45f64ddcf78610237c SHA-1: dca8faee51c318a5b33d3a41ce260bac46b14240 SHA-256: df2545182b4c9027d2e845b876fdc73a1caec5df95120843418395e6edf9b20d
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-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://trafffi.ru/123?keyword=diy+deer+blind+plans+4x6 PDF link annotation
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/raxetam.pdfIn PDF document text
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/cf0f33cd8.pdfIn PDF document text
    • https://fexemefamerera.weebly.com/uploads/1/3/4/2/134236105/948778.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/4336948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugowubuf/algebra_1_eoc_practice_test_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/phn_mm_chuyn_nh_sang_trc_tuyn.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/daroleburojuzavonu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/gusivekegedosoravizu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/bifil.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/rasijixiniret.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/smartfind_express_loudoun_county.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA27 5100 bytes
SHA-256: 3031cf0b270685b5c55170c018428e97f15451e230233ccca7da113690a344c8
font_01_sfnt_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 11716 bytes
SHA-256: 732ccbb318cdd357562bc3bedf035f86081c1a6432ecc1d8b06abbf2fcd75f23
font_02_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3