Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa539995b8dffa4a…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 21:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1773e9516d11f2af8818b4411dfd37c1 SHA-1: eb80afb123a97f8e222dd458717ca63ba0551387 SHA-256: fa539995b8dffa4ad09c3d24e339ce3404d577b734f098d0486267c9dd176ba3
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially garbled, suggests a lure related to a popular series chapter, likely to trick users into visiting external URLs. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=resumen+de+un+grito+desesperado+capitulo+2 PDF link annotation
    • http://niwopofe.scienceontheweb.net/41036369242.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/fixepuxunofud.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/63hcjfF/booyah_recipe_wisconsin.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/bertrand_model_of_oligopoly.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/80761566334.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/igAhiTt/soxupopowoja.pdfIn PDF document text
    • http://visionnew.xyz/ernest_hemingway_biography_youtube6byrl.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/dan_brown_inferno_book_vs_movie.pdfIn PDF document text
    • http://legendnat.space/carmina_burana_percussion_scorex5kf4.pdfIn PDF document text
    • http://punejew.mygamesonline.org/titinijibu.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/56574190804.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/puxekuwusumufaf.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
    • http://pimoxonevuwewax.atwebpages.com/19999488050.pdfIn PDF document text
    • http://rawegutidum.onlinewebshop.net/15806037270.pdfIn PDF document text
    • http://mifedisiso.atwebpages.com/fisosaniwinakegebilojul.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/prepositions_of_place_worksheet_intermediate.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/osha_posters_required_construction_sites.pdfIn PDF document text
    • http://gafodix.myartsonline.com/enumeration_of_microorganisms.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/kenmore_elite_double_oven_gas_range_owners_manual.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_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 5412 bytes
SHA-256: b6a4c9ce52575ea3fea63f146ff21ef0d185fad96e6017ccd78e103ea563bfa3
font_01_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 11060 bytes
SHA-256: 0a11a5ada5502c7f49ccd1f8101deb29ae1fc972d88ea3874359448136897a62
font_02_sfnt_off000121f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.