Malicious PDF — malware analysis report

Static analysis result for SHA-256 04746324e6f7beac…

MALICIOUS

PDF

79.2 KB Created: 2021-03-10 05:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1daf2840cc2a5db6798d2e830c307bb0 SHA-1: dba0496d5755b2ddac36182b79781f3badf187fa SHA-256: 04746324e6f7beac3f3a8903f271d0ec5104fcbceae8a5bcbfcd57979476d4fb
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains multiple external URIs. One URI, 'https://fokemale.ru/award?keyword=classification+des+actinomycetes+pdf', is particularly suspicious as it is hosted on a disposable domain and appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Classification des actinomycetes pdf'. No scripts were extracted, but the presence of numerous links and the ML/ClamAV detections strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/award?keyword=classification+des+actinomycetes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6036cc50abc9b.pdfIn PDF document text
    • http://rewutudot.iblogger.org/black_and_decker_coffee_maker_with_grinder_manual.pdfIn PDF document text
    • http://tells.fun/12657180481adwti.pdfIn PDF document text
    • http://dronextactical.xyz/relic_runner_mtg6gbtg.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/libretto_opera_nabucco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_5fd7f84471b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_601f3041ecc4f.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/pizezazogowadulovobemir.pdfIn PDF document text
    • http://jodujimapiwox.22web.org/free_online_car_repair_manuals.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368977/normal_5ffc17ab97815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_601aab2eee948.pdfIn PDF document text
    • http://salonhq.xyz/jump_force_tier_listy6nun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rulamiji.onlinewebshop.net/what_are_five_examples_of_hyperbole.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/liftmaster_377lm_factory_reset.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/auguste_comte_filosofia_positiva.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/pigasukasaranu.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/how_to_find_the_angle_measure_of_a_polygon.pdfIn PDF document text
    • http://jonilobasi.epizy.com/netflix_logo_animation_template.pdfIn PDF document text
    • http://fogesogorukob.epizy.com/nombre_rationnel.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_05ddb6710bf949afb559aee36f16937d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/xilemam.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_28a0be5455bb4c6e8a46ed8539aa9092.pdf?index=trueIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_45c926a9daff4a01b898f79cc312c324.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 5212 bytes
SHA-256: 299fdb274162d5df64d7f96e25f2370394f08d552996f5c90c571ecc2f7f5542
font_01_sfnt_off00010b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3B 10536 bytes
SHA-256: 58fc551d12fbc5bb8288aa83e571407e30efac14b85adfb3ed4248810f008f08

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