Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d71b63eda716d31…

MALICIOUS

PDF

80.7 KB Created: 2021-02-28 00:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5ffeb509e52e4226beba75bc7b65ee5c SHA-1: 5563b1e0e84a9f01c2ee383aa850a71863fd3741 SHA-256: 0d71b63eda716d31a7e912c4c63e9d53fb7e30a59e2d7e95bd1fb7245d74185b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, many hosted on disposable domains. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/aws?utm_term=the+highwayman+cyberpunk+bug PDF link annotation
    • https://lezekuzog.weebly.com/uploads/1/3/1/3/131378913/mejevigijuk.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/xovanakijog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368985/normal_5fce4f091d98c.pdfIn PDF document text
    • https://sivitudogadix.weebly.com/uploads/1/3/4/1/134108631/fe5401430b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_6034d0ff265bf.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/dunejapusorefuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/jhjjzje/100_doors_floors_escape_level_39.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/4142194191.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/neato_botvac_d401_connected_-_saugroboter.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/ti_84_calculator_free_trial.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/sofax.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/VKidF14/bopesezodonise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_6000e62958f24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471252/normal_5fe54e527068d.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/f4qb5gc/buzzfeed_news_fincen_files.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/ibfVUaQ/timuli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jexeboxemu.rf.gd/awadhesh_premi_ke_bewafai_video.pdfIn PDF document text
    • http://bopebewi.epizy.com/15746471222.pdfIn PDF document text
    • http://pititonekeget.epizy.com/4814936991.pdfIn PDF document text
    • http://litorow.myartsonline.com/razor_e200s_scooter.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 5484 bytes
SHA-256: cb41e9ef887e6c0b5cf34053db5d0ebe4395e5466d0f4abda7d3e649c65993d6
font_01_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 10876 bytes
SHA-256: 412e5b9a9a2fec18229267148ccaf82d6e86b158aa5a79d05a962fb592174753
font_02_sfnt_off00011ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF2 16164 bytes
SHA-256: 19830f1e4f67038a7dc608fbb3de26b020266950e6746ee8e8edcf8e16cfe4ea

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