Malicious PDF — malware analysis report

Static analysis result for SHA-256 1191463e201979c8…

MALICIOUS

PDF

79.3 KB Created: 2021-02-19 06:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: db581c9f6bb05aabece84dcc52037827 SHA-1: 1dd4480adba39c41f330f014e888829996502042 SHA-256: 1191463e201979c84acc2aca89c1ba10865035e62ef5ce3706a6c4fe5507b783
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=organic+chem+acs+exam+pdf PDF link annotation
    • http://counterman.ru/tukitiwav6x73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450638/normal_5fe459f446577.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/Sjin3gL/gold_armor_minecraft_update.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5fc86e5accb14.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/1849104.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/hwyhjMP/daber.pdfIn PDF document text
    • https://ludajajuxo.weebly.com/uploads/1/3/5/2/135293479/f63f8f56242044.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/4467083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_5fcc9c03b205e.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/Ejfibw2/vipifariginipakurodibega.pdfIn PDF document text
    • http://trudogoliya.online/kamasutra_book_with_pictures8p09t.pdfIn PDF document text
    • http://marketitaly.info/840286620398xro0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/9704690826.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/nice_hypertension_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/41443740869.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_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 5632 bytes
SHA-256: c3ad22b5766dbc93aa61ab17a3609f0ccb8ed7daa61342408706b96f29f59ad4
font_01_sfnt_off000109de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DE 11312 bytes
SHA-256: 33a212d98f8b177d38e74991aefea2dc25e92a58f41271d8f17e3afcb8d7ae03

Open this report in the interactive analyzer, or submit your own file for analysis.