Malicious PDF — malware analysis report

Static analysis result for SHA-256 7508da30b4046153…

MALICIOUS

PDF

73.0 KB Created: 2021-01-20 08:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 40ff36c539751019085983d75f38c80e SHA-1: 00e04cad896ab2b6a001b1d743a8c4ec46d8ee3f SHA-256: 7508da30b4046153c5840863fbd69a9585d0d4f0cb975c4b015e99dbe13900e9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL identified is traffnew.ru. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=ace+in+the+hole+sump+pump+home+depot PDF link annotation
    • https://site-1259767.mozfiles.com/files/1259767/43458461760.pdfIn PDF document text
    • https://site-1173572.mozfiles.com/files/1173572/rolling_stone_top_500_albums_list_2003.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/3741352.pdfIn PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/top_christian_songs_2020_billboard.pdfIn PDF document text
    • https://site-1195445.mozfiles.com/files/1195445/64993012747.pdfIn PDF document text
    • https://site-1178842.mozfiles.com/files/1178842/46823497447.pdfIn PDF document text
    • https://site-1172440.mozfiles.com/files/1172440/dafalujevupujuv.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/99524807941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terefikug.epizy.com/albinismo_genetica.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/37526650840.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/28387000043.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/43918636261.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/acls_study_guide_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/1832_asset_management_l._p._annual_report.pdfIn PDF document text
    • http://biborufa.epizy.com/garden_answer_laura_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/ariel_tatum_ari_lasso.pdfIn PDF document text
    • http://jatuxijor.epizy.com/jometekedapopokimigox.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_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 4996 bytes
SHA-256: 6ea453a94a7c4691e89c33ae4ed0d2e70834810d3b330fb614836eedc582cd83
font_01_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 10588 bytes
SHA-256: b5db56e306ab62189182b73c0ff4e36b9f6e2f51a13187c6cf73d845cbd0e6ce

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