Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0a177f0c3f6665…

MALICIOUS

PDF

74.6 KB Created: 2021-03-24 00:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cba3b2e487552d23342f6c2ceba6ad51 SHA-1: 473ff20709ec39175b68faf9307b172d7326399d SHA-256: dd0a177f0c3f66659cf5ff38e44d16e198435b8c66baa9852ea2e791776c5998
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs, with a notable one being https://ponafet.ru/123?utm_term=english+tenses+practice+test+with+answers, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'English tenses practice test with answers', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/123?utm_term=english+tenses+practice+test+with+answers PDF link annotation
    • http://fituxem.sportsontheweb.net/6.0_powerstroke_hp_rating.pdfIn PDF document text
    • http://timinome.getenjoyment.net/wheres_waldo_womens_halloween_costume.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/basic_wing_chun_training.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0fdd77-36c9-416b-bf52-504eee39a4d9/hoover_floormate_spinscrub_800_hard_floor_cleaner.pdfIn PDF document text
    • http://bulufuw.rf.gd/79252818815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d85b454d-4403-4322-863b-5989625d0527/tadagunasapapadekejajavif.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/81732100195.pdfIn PDF document text
    • http://woxesizefibugel.atwebpages.com/pebuliwijobanalanawabolav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b634f943-5eae-459a-b36c-7a28a760fe55/lexot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf67605-842d-4917-bfae-118d4a2c6f31/pabolitaxojanusetowe.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/medidas_de_higiene_covid.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/62008768639.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/bopodozitita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cb402a-b448-46b2-834b-c32b7c2aab3a/pakijafijupitafuwunapej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82488757-e734-4df7-ae22-513181248af3/91799393138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33329e6f-499d-4493-9939-e6cc44bc1961/nivafurav.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/mole_conversion_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/non_resident_capital_gains_tax_hmrc_manual.pdfIn PDF document text
    • http://jobiduleger.epizy.com/financial_accounting_williams_haka_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/58421791572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc6332e9-759c-4530-9d6b-f5ded7a25183/vawar.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_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5244 bytes
SHA-256: fb9a18a4229fa2e52216e7aad192314c682a73656daec417648ec1f598d6dc2a
font_01_sfnt_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 10700 bytes
SHA-256: 4c58ab99338c1e9547ef8beebdf49f981df3d5a7739ec1712cc7053009928111

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