Malicious PDF — malware analysis report

Static analysis result for SHA-256 047c64424fa17407…

MALICIOUS

PDF

73.9 KB Created: 2021-03-11 12:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b4758646c0312b2375723a4210ef0bc4 SHA-1: f4bee14c63e08445cdad22a2bc3c5bad4537fc30 SHA-256: 047c64424fa1740719aaf5c5674e67a2eac9dc32f8989a3416d813a12cc2206d
126 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'bologen.ru', and is identified as a link farm on disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to 'Xanathar's guide to everything barbarian subclasses'. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to malicious content.

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/123?utm_term=xanathar%2527+s+guide+to+everything+barbarian+subclasses PDF link annotation
    • https://xixusumer.weebly.com/uploads/1/3/0/8/130814933/xowoso-xifabazudibana-malifat.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/WYCghNV/88542634861.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/jeHicij/best_pop_up_selfie_camera_phone_under_10000.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/t1jjZA4/49565174443.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/fokid_gosexilom_godawonisa.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/c3da2f8107161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimibini.epizy.com/list_of_irregular_verbs_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516378ce-7636-40e0-8b8f-d78f58bf1db4/peberajepome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03914482-9df1-4398-b0a3-f6c40f6bf5c9/count_dracula_book_summary.pdfIn PDF document text
    • http://vojasokizew.epizy.com/52825069288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1b01ed-e768-4739-a607-e57165e54dcd/dumoxamagujove.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_effa3a83acdf4425a2a39c29655e3e77.pdf?index=trueIn PDF document text
    • http://fufezexu.epizy.com/66262394415.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_95a4e54f97d1499faee11ac0ca9a6171.pdf?index=trueIn PDF document text
    • http://neveket.epizy.com/does_alexa_echo_speak_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63458de-6cc7-4649-a291-17cba16886b6/sims_3_64_bit_catalina.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/90188785690.pdfIn PDF document text
    • http://zumikatumisi.rf.gd/biosynthesis_of_bacterial_cell_wall.pdfIn PDF document text
    • http://fepujusarif.epizy.com/70005688830.pdfIn PDF document text
    • http://pederufe.epizy.com/14058217415.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/moliwawejipujunagak.pdfIn PDF document text
    • http://dasubaweno.rf.gd/ldpe_plastic_sheet_canada.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_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 5516 bytes
SHA-256: 8781f6e6b6847ee3b27916ffd39e1ea3df8cfb0a7530c5ee2f803e8bff3d5796
font_01_sfnt_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 10056 bytes
SHA-256: fb6b635d1e4d3cb08e73bdcd7ddc1a47f99ac369ac664f7dabfaf58b3e320e47