Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ca5560278351fe…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 07:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a38de5e81e46cd4d955ba1caf7a30de7 SHA-1: eef28ce2d8510ca0056d44df3f8fd11bdf4e89d5 SHA-256: 07ca5560278351fe893b382a250be8f34914b36d1e36a26fcb20158fe0616c8a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/wix?keyword=pinarello+rokh+2014 PDF link annotation
    • https://xazovobarobek.weebly.com/uploads/1/3/4/4/134403102/6529797.pdfIn PDF document text
    • http://mbfsopg.com/gedagujopivimisifonelkvbw9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402517/normal_5fe473daefcf4.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/70bbd8570a2.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/9642667.pdfIn PDF document text
    • http://crawlmqyu.space/zitefukebotisunavefutx0xsy.pdfIn PDF document text
    • http://damvglaz0.xyz/67126225843u4e5p.pdfIn PDF document text
    • https://jupuwova.weebly.com/uploads/1/3/1/4/131409597/bowimalagetesidot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5fdcfb3e81af4.pdfIn PDF document text
    • http://normaa-id.com/30406851717je9io.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd3b63aa5751.pdfIn PDF document text
    • http://topdouche.xyz/how_to_calculate_break_even_margin_of_safetyjbfe3.pdfIn PDF document text
    • https://wiwufupa.weebly.com/uploads/1/3/2/8/132814928/doxuleruburaniz-tibezopo.pdfIn PDF document text
    • http://bilet-pdd.site/zugijubrj13r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_6000c0b489a41.pdfIn PDF document text
    • http://firstsecu-paypal.com/textbook_in_chineseispdo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5ff3eae0a4853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_600fd831a3160.pdfIn PDF document text
    • http://armlur.space/how_to_take_apart_lg_top_load_washera4atq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fdfde6e23508.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jexijer/aagadu_audio_songs_ing_come.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/answering_the_phone_in_german.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_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 5072 bytes
SHA-256: 86d0a32aec4510f323289824765b0ecf61ebeca5935e58b1b73b8235db5eff5f
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 11428 bytes
SHA-256: e87bad53af18b413f9181dc5d2928a5e59c1ac30091d090d56f187bddc2f22d9

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