Malicious PDF — malware analysis report

Static analysis result for SHA-256 118ac7d749fd7663…

MALICIOUS

PDF

74.5 KB Created: 2020-12-25 16:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecf207c4e91cec077e1d759b0627d49a SHA-1: 7dce4e71f846bed5fdd4fcf60f71f5401740b378 SHA-256: 118ac7d749fd76635584d1f1205e260c2c6298291a2e6e0d05a9468e7ca352bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one pointing to a suspicious domain ('trafffe.ru') that is likely part of a phishing or malware distribution campaign. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, suggesting an attempt to manipulate search engine results or distribute content widely. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=project+free+tv+the+bachelorette+au
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/savutatiwagupu.pdf
    • https://cdn.sqhk.co/vowibesep/jbjcgcQ/snake_simulator_mod_apk_download.pdf
    • https://polipofixino.weebly.com/uploads/1/3/4/5/134598506/rososokosudisif.pdf
    • https://cdn.sqhk.co/nebuneduzib/UsjbhiV/rajinemawadibis.pdf
    • https://cdn.sqhk.co/kitaparek/eyiigc9/zenonia_5_zen_mod.pdf
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/3510719.pdf
    • https://nategenuniko.weebly.com/uploads/1/3/4/7/134749174/384acb3c3c8edf.pdf
    • https://vejewumuwuwaja.weebly.com/uploads/1/3/4/7/134759129/gafupuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wegugus/88344049955.pdf
    • https://s3.amazonaws.com/mijedusovineti/23610006329.pdf
    • https://s3.amazonaws.com/kefiperizonofu/fubujile.pdf
    • https://s3.amazonaws.com/julaxel/mozeripomokugapumixofi.pdf
    • https://s3.amazonaws.com/datarofapakil/xixafe.pdf
    • https://s3.amazonaws.com/jazuravazaguz/tonicity_and_osmosis_worksheet.pdf
    • https://s3.amazonaws.com/levovod/labour_and_monopoly_capital_braverman_1974.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52c.bin
4a8d7ab02982e1fec6139c1a3bd0f7ebec1edf7f168a50fcc551d1b1e8af9c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE52C 5068 bytes
font_01_sfnt_off0000f677.bin
25f2a3cc46db56328629e4f0e0ad8268a3e2fa0e9f455e2c11d47d38b6f4c648
pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 11244 bytes