Malicious PDF — malware analysis report

Static analysis result for SHA-256 197cc296664b3ff6…

MALICIOUS

PDF

66.9 KB Created: 2021-03-19 09:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d9eb84c34b8235443c52169082c5bbf0 SHA-1: e9371b4d5f39ba05b71e516bd2760ed60fbf75d1 SHA-256: 197cc296664b3ff6172049a2c0fcddcfd341370999235775e44fd34197d7947a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the primary URLs, 'https://resalured.ru/strik?utm_term=stihl+ms180+chain+adjuster', indicates a potential lure related to product searches. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://resalured.ru/strik?utm_term=stihl+ms180+chain+adjuster PDF link annotation
    • http://wewogokuwidu.mywebcommunity.org/american_government_and_politics_today_the_essentials_19th_edition.pdfIn PDF document text
    • https://lefojokux.weebly.com/uploads/1/3/5/3/135399193/xamale-powim-sabefo.pdfIn PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/865419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fd651379f60e.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/3277346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389394/normal_6002b26da4ffd.pdfIn PDF document text
    • https://tasekesin.weebly.com/uploads/1/3/2/6/132695719/d38900.pdfIn PDF document text
    • https://ruxuxosiforedop.weebly.com/uploads/1/3/4/4/134491380/vipovikidoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_6000c5a51f41b.pdfIn PDF document text
    • https://kepegefamoza.weebly.com/uploads/1/3/1/3/131398453/zunewodekaxotu-ditutaw-panazekakisiz-xebufegoruraze.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/ataturk_airport_map.pdfIn PDF document text
    • https://raxugujelagad.weebly.com/uploads/1/3/4/1/134108814/8230549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_c4e50e2d0f114c07998bf672fb0c3992.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_00e6041f02a648fa975dc7df923ff08b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/68693602936.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/man_repeller_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/analytical_philosophy_of_history_danto.pdfIn PDF document text
    • http://gefilodeza.myartsonline.com/rigefadufebed.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_off0000c689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC689 5748 bytes
SHA-256: 6d0efd76f19cfbbff1dfb6821b0796eb51227cae120fd14bb2a5121aa8a87b6e
font_01_sfnt_off0000d9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 10788 bytes
SHA-256: c9568450053107cb2e5027135671d4b17f086b5af9fef37f9bbe91b6c1783da2

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