Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bb4e92f59d88c0…

MALICIOUS

PDF

85.9 KB Created: 2020-11-13 01:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 239fa20a35b128b137274c3e4aa304df SHA-1: b9d7bef39b8cc82fa3aac692adbf04948f1bd80b SHA-256: 01bb4e92f59d88c0964ea972f71db7b558b746de3f3ca844f511edc0aa1262a8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=marshall+as50d+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5fa1ac63d7c5d.pdfIn PDF document text
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/vemomenenevawovob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f91eae73e061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_5fab102300464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417406/normal_5fa29da93e525.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/wotebuxelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8f393be8bd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitajosasa/41445037876.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/barry_has_a_secret_unblocked_games_66.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/programming_in_lua_4th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/34006911239.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/81615921614.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/the_roman_republic_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A4 4864 bytes
SHA-256: d0b06272b200ebeab22f720292cbe8efdb8d265eedd2989f2ac7a292a338c45c
font_01_sfnt_off000117e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E4 10852 bytes
SHA-256: 11b2bebd8ec2486a94edfbd36b1828158ee22b7993c7f8c1d6efe630a48ed876
font_02_sfnt_off00013cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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