Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3e93e8d7a55bf6…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 02:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4773c4904fe42ecc040c826f63a2ad92 SHA-1: 18bc213423d1044c4de794ad9afd798889f122ef SHA-256: 3d3e93e8d7a55bf648608bd55038b331087a923a65abd9e187838813c631703e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to harmful 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://midufefew.ru/wix?keyword=stoichiometry+practice+problems+with+answers+pdf PDF link annotation
    • http://eliyalte.com/what_speakers_are_compatible_with_audio_technica_turntable3kv8w.pdfIn PDF document text
    • https://zugavugusalozi.weebly.com/uploads/1/3/0/7/130776271/kiporilipamidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_602ab4d40fc6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5fc8a93db8714.pdfIn PDF document text
    • http://sodahq.pro/what_causes_a_gas_oven_not_to_workx8ntn.pdfIn PDF document text
    • http://goodsun.space/24307042008hhmi2.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/livul-ledupov-mixovetuw.pdfIn PDF document text
    • http://glasshookahcatering.com/what_does_bingot_in_english3rsdm.pdfIn PDF document text
    • https://jodajapiguzok.weebly.com/uploads/1/3/2/7/132710756/1d82bb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_5fe6b0e484a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fe8bd0f945e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_60409ce5d9828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_600f9976d4657.pdfIn PDF document text
    • https://tuwagufo.weebly.com/uploads/1/3/3/9/133999840/kibogutuvug_luzeb.pdfIn PDF document text
    • http://pristav.pro/ciaphas_cain_hero_of_the_imperium_review8dg98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sunefosopibe.rf.gd/bpssc_si_result_2020.pdfIn PDF document text
    • http://porumujowupof.epizy.com/allosaurus_habitat_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/how_to_print_photos_on_hp_officejet_4630.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/jutirakemukevudovutor.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/98282303978.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/automate_excel_spreadsheets_from_sql_queries.pdfIn PDF document text
    • http://jijetebum.epizy.com/nekasomodoweme.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_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 5832 bytes
SHA-256: 4b864ebce75191a078dce0a1d985a02c68d6bee81730c3db474ab08a4721a924
font_01_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 10968 bytes
SHA-256: eabca4ec06485e6cfeb817ce6c47b2ff82b8f96d59af6cc6e1489600507b91de

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