Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd4acb6b2ef2005…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 10:06:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ff650e03c9d8bc16f4da865e34d4d308 SHA-1: de1a8524b179e14931f3de5008cfe6794e49027b SHA-256: 3bd4acb6b2ef2005045517f099f7813ebeee105eb3653f48b169fcf78e8f1bc8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically leading to a suspicious domain (`lozipotod.ru`) disguised as a search result. The heuristic firings indicate this PDF is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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://lozipotod.ru/strik?utm_term=what+reactants+are+required+for+cellular+respiration PDF link annotation
    • http://saxozumipelezip.22web.org/how_to_use_head_and_shoulders_scalp_detoxifying_mask.pdfIn PDF document text
    • http://opt05.ru/xupigulalovejuvowalieswo8.pdfIn PDF document text
    • http://prizinsta24.site/is_fifa_20_available_on_ps_vita5mna8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_85ba44a3763342f5b110c353a9905456.pdf?index=trueIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_9804200b39af49fb943f3be3a7235922.pdf?index=trueIn PDF document text
    • http://timarofata.epizy.com/what_did_muhammad_ali_say_to_jerry_quarry.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/barriers_to_communication_process.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_a3382d2fb05541afb69d9fad57d7b47e.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_c283682786aa4d32a53f7e70647a0876.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b196b7b-a119-407c-ae74-d0b28bdc8ac2/how_to_start_a_catfish_farming_business.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/carte_de_visite_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/gst_information_in_english.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_5ffb8f327c3147b8a7bf7d7b6823b348.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeroguru/pgt_education_answer_key_2016.pdfIn PDF document text
    • http://mezexefobotero.epizy.com/immunization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/98533613133.pdfIn PDF document text
    • http://nebaxowowugi.rf.gd/convert_to_word_best_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c4edbb-e997-4cd3-a03b-0e8b5a5a34f0/how_to_update_sharp_aquos_smart_tv.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_off0000ff72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF72 5384 bytes
SHA-256: afa06960c080936b49794f17abacfc73607a13db8b7ddae4787fa3b23a052eba
font_01_sfnt_off000111c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C8 11052 bytes
SHA-256: cb40f40e0a5595d634fadd1d44d6054ae7943be231986feaab366dc7408e38a8

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