Malicious PDF — malware analysis report

Static analysis result for SHA-256 6790599111679f6e…

MALICIOUS

PDF

73.2 KB Created: 2021-03-03 06:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f0c23ad15c83c69ae0352aa85a11d52 SHA-1: 70e1c676c35c67f6321f294bc413df792079e2e1 SHA-256: 6790599111679f6e0ab60c20b884189a433b387326e97fd8a2a73cab88c1c0de
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one that appears to be a search result lure, suggests an attempt to redirect the user to a potentially harmful website. The PDF structure itself is identified as a link farm on disposable hosting, further supporting a phishing or malware distribution scheme.

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://jacksth.ru/123?utm_term=what%2527s+the+difference+between+sodastream+source+and+power PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369310/normal_6011ce7570a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_60207a9bb2e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5fd915301a2fa.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/the_god_ask.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fee8c3292ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5fe6dbb4276bc.pdfIn PDF document text
    • http://zufemefuzubaje.iblogger.org/61645368073.pdfIn PDF document text
    • http://paselon.getenjoyment.net/xazexewibesupixidolasog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474457/normal_602f11cb1cdfc.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/uglys_electrical_references_2020_edition_6th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_6034721693a16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojagosixotebut.rf.gd/difabipazupamax.pdfIn PDF document text
    • http://mewatubaliz.epizy.com/jotedojuzen.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/95843609250.pdfIn PDF document text
    • http://bususetut.epizy.com/cuneiform_tablets_description.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_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 5644 bytes
SHA-256: 69c2e8440e64f676b473fa8053df90cf79d671a72b4191ed0c971e4220213f69
font_01_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 10572 bytes
SHA-256: de3f7ccce02a22582648087d96fb5f4636114f90cdd3e3526cdad34910afa9cf

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