Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab05fa824ecb23dd…

MALICIOUS

PDF

76.0 KB Created: 2021-02-26 08:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e3714d79a094dab42adc2c559b7b176e SHA-1: 6714846a7fb2492541884294a505bbdd3fae902a SHA-256: ab05fa824ecb23dd0d6b39101afcdf42ff12902a5ab1d8793c6b8707aa32e1ee
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and potentially malicious content, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=newport+library+catalogue PDF link annotation
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/2467791.pdfIn PDF document text
    • http://fdvsefwfrw.space/34754058060swe8q.pdfIn PDF document text
    • http://iglivesupportteam.com/fepuragavoz2dwhq.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/higihbO/jamidufupokuderima.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/gfkQKpJ/download_game_manor_cafe_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/hdzjdjg/human_resource_life_cycle_definition.pdfIn PDF document text
    • http://hotsales-com.xyz/58405322393h2b1h.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/fgeMzg3/healthy_yogurt_fruit_popsicle_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/jfighc5/65731523099.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/iexw1gc/34943745050.pdfIn PDF document text
    • http://safetymirrors.xyz/inversiones_temporales_es_activo_o_pasivosk6ym.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/IbAghHq/70026998331.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/jhhDhdb/uphill_rush_6_game_poki.pdfIn PDF document text
    • http://lumacy.site/falcon_bms_israel_theater_downloadl2iie.pdfIn PDF document text
    • http://freds.space/bridges_math_kindergartenyrxhc.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
    • https://s3.amazonaws.com/gusule/3905477581.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/microsoft_word_spelling_checker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/1458410656.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_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 5000 bytes
SHA-256: 28af2ccc8a2ac95f6cde1e40a479f73a563e7d1a3780c74af1feac7c3802b212
font_01_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 10540 bytes
SHA-256: b171ca59f072484c8aa9feaf511d7b05dc01a45a7cf6012386410ac1d1e8d63c
font_02_sfnt_off0001148e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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