Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c965f8443b48810…

MALICIOUS

PDF

102.1 KB Created: 2021-03-22 00:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d13a00f37595dbba3d6ab62a214b6df1 SHA-1: 3e90e24c1b7a2bf6c626f6a81516b1988c9ea5a1 SHA-256: 2c965f8443b48810131159aec438c5740842050350127acc69158f6518a25b25
134 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, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including those on disposable hosting and with UTM parameters, suggests a link farm or phishing campaign. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern, aiming to trick users into clicking through to malicious destinations.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/wix?keyword=bodyboss+ultimate+body+pdf+download PDF link annotation
    • https://cdn.sqhk.co/lutotilivik/GilRhhi/lebara_top_up_plans_netherlands.pdfIn PDF document text
    • https://cdn.sqhk.co/dikonutudibe/jcjaijj/mandated_reporter_training_california_online.pdfIn PDF document text
    • http://dafesoxexigu.medianewsonline.com/xukemoremir.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/tovisuvab7g333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_601988b0a5075.pdfIn PDF document text
    • http://nuturejedekaw.22web.org/avengers_endgame_full_movie_online_leaked.pdfIn PDF document text
    • http://allieshouseofhope.com/73042846719i96q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_5fe8f8f9290a0.pdfIn PDF document text
    • http://jabobafom.iblogger.org/what_does_ghetto_mean_in_italian.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/basic_programming_concepts_download.pdfIn PDF document text
    • http://handler-autoscout24.com/mewukuyf55i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_60390d1d103c8.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/vaderopadirudomumefizol.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/11397863127io8ao.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rulekozerojukez.rf.gd/matatodepewavofesiza.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/indian_rupee_symbol_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/how_to_get_into_navy_seal_training.pdfIn PDF document text
    • http://xonisuxumezitez.epizy.com/jovimanaluludimitevevug.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/43745545273.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_off000145b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B6 5476 bytes
SHA-256: cdc4145f1449c7c51380badc4eded6889c9a4b491d2120bb9f9f864fcf5ba197
font_01_sfnt_off00015859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15859 15740 bytes
SHA-256: de66598520ab64f78a29fbebaa43949f0d5ad5577eb353a6713f84a5f94caf1c

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