Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaab680c2d5ceed…

MALICIOUS

PDF

74.5 KB Created: 2021-02-26 04:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c452976cdfeffb28ebe3e292216d6408 SHA-1: 6f5c2d7fead8cf9d7d1ae43d43824c3a98c20aeb SHA-256: 2eaab680c2d5ceed47be5af75c5472e3ff2b6a1942c7a32b99748ebb5a2559ff
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 or trojan variant. It contains embedded URLs that redirect to link farms and disposable hosting, suggesting an attempt to obfuscate malicious destinations. The document body, though heavily obfuscated, appears to be a lure related to search queries, likely intended to trick users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=what%20are%20two%20duties%20of%20a%20trustee PDF link annotation
    • http://pigigozoruda.mypressonline.com/84801529383.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/whats_a_word_for_not_listening.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_60240c5bb5260.pdfIn PDF document text
    • http://cleanup-sale.site/clarke_cochrane_christmas_classicvhmz6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fc79c6ed1368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443362/normal_6024c3c74aa8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_6019beb215b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_60192abd62ed3.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
    • http://pivimufe.atwebpages.com/how_did_the_pigman_wife_die.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/zusojofixenevobujedafiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/b._t._c_form_date_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/canon_rebel_t6_eos_manual.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/how_to_change_time_on_samsung_idcs_18d.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_off0000dc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0A 4844 bytes
SHA-256: 4c7553585fd6019523d8586df9a7743decb09925820347804244e6dd8198c848
font_01_sfnt_off0000ecae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAE 10060 bytes
SHA-256: 99f3836439c048f56fa8f86bea6f1d011342d887a9515d1d79d560e3a6afb362
font_02_sfnt_off00010f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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