Malicious PDF — malware analysis report

Static analysis result for SHA-256 b113bebbcb373bb7…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 01:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3715b9400a1f3116cbf92fdb4dcfd3a1 SHA-1: 7cb62fbf1249882e8eced5c01a29b0f1be2eff0c SHA-256: b113bebbcb373bb7d9496722a5a9ce356524aa1fb0b16fdc51ce96fe4ee00e3b
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. One URL, 'https://seumenha.ru/strik?utm_term=casio+ms-80bm+battery', appears to be a redirector for a phishing lure.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=casio+ms-80bm+battery PDF link annotation
    • http://constructionhouse.info/why_is_waiting_for_godot_called_an_absurd_playq27i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_602d8be037d56.pdfIn PDF document text
    • http://1pokypki.website/58205899553kqvkp.pdfIn PDF document text
    • http://wssummer.space/word_doc_tax_invoice_templatee61du.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/ifrs_15_practical_guide_pwc.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/tc_electronic_hall_of_fame_reverb.pdfIn PDF document text
    • http://koolmaxt.online/97820446069xbo5z.pdfIn PDF document text
    • http://meetcabinets.xyz/36486746528movqc.pdfIn PDF document text
    • http://prostosite.site/kirebot0tmvj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_6042c886279ec.pdfIn PDF document text
    • http://belplitka.ru/81125030414a3coi.pdfIn PDF document text
    • http://prodit.space/addressing_mode_of_8086_microprocessorvl8jq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8ce6ad-2f07-4324-be0a-1b345a9e317a/5990280648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83905dc4-a117-4c1d-8c3d-f07343ac94e2/homelite_grass_trimmer_string_replacement.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_54c88293218247c68dd0feeb3ad246fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/396e88be-c8f7-4f72-856d-2ec4900bb0e9/dezetudev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d594b3-d549-47e8-b1a1-727aa74807cc/25289370686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8784b81-7457-4849-a0e3-f5cc9ba93833/tenud.pdfIn PDF document text
    • https://d7504aae-3d37-493f-8789-a5629a6fcc30.filesusr.com/ugd/7ca9f5_e33b3f00123f4794adce29a120f85db2.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE705 5316 bytes
SHA-256: 3d2e87862ccc7152d7af0f21c2addca7c7b97bf4e768d6dc957a5156c23399fe
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 12268 bytes
SHA-256: f6209b85a922983eae07682b91820d2ca7d451d885dc45e42395d463964c0da4
font_02_sfnt_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 16076 bytes
SHA-256: 8ea7f1c1fa5cae84799308c3b5277d4d512d786787cd8f2796a1af00f3b64e48