Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb5bc7b12fa05c6…

MALICIOUS

PDF

84.7 KB Created: 2021-03-01 02:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 93c8e2123625b9e32b52bc6e6c1b8fe2 SHA-1: 0ea76b5c032168b7ae5d3e1412b196c153cffdb9 SHA-256: 5bb5bc7b12fa05c6f056d75e96a0ab78127644a8a346c741165a182b0e43641b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially exploiting them via social engineering.

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://gimoguvi.ru/wix?keyword=wow+horde+mining+guide PDF link annotation
    • http://vefipitop.22web.org/46211985154.pdfIn PDF document text
    • http://jovekasad.iblogger.org/relative_pronouns_worksheets_for_grade_5.pdfIn PDF document text
    • http://stixlife.info/38668138842qqbo8.pdfIn PDF document text
    • http://savekawiki.iblogger.org/how_to_replace_a_toto_toilet_fill_valve.pdfIn PDF document text
    • http://degadeg.22web.org/smash_bros_ultimate_dojo_guide.pdfIn PDF document text
    • http://de-bewertung-889562.icu/kikejexabujofizunibebz8r8v.pdfIn PDF document text
    • http://canlisohbetim.net/instep_bike_trailer_hitchme3aj.pdfIn PDF document text
    • http://datujizid.iblogger.org/daxuwapakojuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogewafusa.rf.gd/online_timer_bomb.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/jujatujugiledabona.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/physics_textbook_class_12_maharashtra_board.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/persepolis_online_castellano.pdfIn PDF document text
    • http://zopefunexot.epizy.com/mass_effect_art_book_expanded.pdfIn PDF document text
    • http://pugagewuda.rf.gd/43614342660.pdfIn PDF document text
    • http://nisakujavo.rf.gd/21000882190.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/bafewufixekisiv.pdfIn PDF document text
    • http://rapuwovire.rf.gd/34245721761.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_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 4924 bytes
SHA-256: 0d8a7a0ebd0cbe57cf9b33fcfd6f5309d95fb27d8eb7617fa693be0972b68233
font_01_sfnt_off00011f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F18 11360 bytes
SHA-256: a9f119603751396ce5139dd8e24c9a7233b5348df6c67b5c84c749bf8fe29cb0

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