Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b661e2a763dba9c…

MALICIOUS

PDF

68.5 KB Created: 2021-01-19 18:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0faf67845f7df714359bd7ba37d2ca2e SHA-1: 74289dbb1b7ad62da9002b772ad2a5edae8bcd6b SHA-256: 9b661e2a763dba9c11f5d34222d0564d0171f924a0e7018f1c382f95a1e35c1c
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through the embedded links. No scripts were extracted, but the PDF structure and URL analysis point to a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffnew.ru/aws?utm_term=biriyani+tamil+movie+free++hd PDF link annotation
    • https://site-1171905.mozfiles.com/files/1171905/iphone_xylophone_ringtone_download_pagalworld.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/dezukibopemekadid.pdfIn PDF document text
    • https://site-1214349.mozfiles.com/files/1214349/20066954431.pdfIn PDF document text
    • http://bemelegevew.22web.org/converse_clothes_size_guide_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fb8c27e6abbd.pdfIn PDF document text
    • http://makikupake.iblogger.org/42498420945.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonutosi.rf.gd/lekifesuvarivemaxeri.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/9530050370.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/68018809148.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/free_driver_printer_dcp-_t300.pdfIn PDF document text
    • http://renawexit.epizy.com/bhakti_sangeet_for_mobile.pdfIn PDF document text
    • http://kiduxoz.epizy.com/jane_eyre_review_questions_and_answers.pdfIn PDF document text
    • http://dipuvomefig.epizy.com/babuzevut.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_off0000d04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 5180 bytes
SHA-256: b143d9c11a6606d995aa6be674ae03a265a706d8eb8ae474ea4e41068fdd643e
font_01_sfnt_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 10412 bytes
SHA-256: ee26c43b38c85fb6e753f60cc551302ca292ba35cde851df32057b21e9d644c2

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