Malicious PDF — malware analysis report

Static analysis result for SHA-256 517ade095783376f…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 18:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0a65c4a8d9b888803ca79e5a2ff9760b SHA-1: d5713190fc3ff6e7979a21fcea498c77b35c1231 SHA-256: 517ade095783376f376fe69b791578ce2f52a2ed18f184f1b52a648b7661ee76
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('ponafet.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, suggesting an attempt to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=energy+sources+and+the+environment+answers PDF link annotation
    • http://9gusevshop.space/1530399634671m7b.pdfIn PDF document text
    • http://hookup755.fun/how_much_does_a_thermo_king_apu_weight2wty9.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/dADNhbZ/paxepejenevefolixevapu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/zBhfgfX/death_shooter_4_mission_impossible.pdfIn PDF document text
    • http://flowerport.market/18282778111rndho.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/9839573.pdfIn PDF document text
    • http://floradoma.net/hikaru_nara_piano_sheet_freec0rvu.pdfIn PDF document text
    • https://xufevojulan.weebly.com/uploads/1/3/1/3/131384667/9684876.pdfIn PDF document text
    • https://metekubop.weebly.com/uploads/1/3/1/4/131438843/51d7cfe09c3f.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/a529a023-0c4b-4c7e-a004-188ab53b6c70/list_of_influence_tactics.pdfIn PDF document text
    • http://doguzikeva.epizy.com/84483817539.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_f22e23f88e4c4ad9b3744a79e36e9328.pdf?index=trueIn PDF document text
    • http://tipaduvorul.epizy.com/discrete_mathematics_an_introduction_to_mathematical_reasoning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d80c675-e373-4241-adde-23f1fcc03e2e/ropemawisomaro.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_7406ac88df264407b62aa26389d87f9f.pdf?index=trueIn PDF document text
    • http://xevezowa.rf.gd/47580271173.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_3ea02c1e5d704abe8f2c1fd0d391c1f6.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_55dd0a67fc724dd289c922cb0a7dd4bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6505b20f-d011-4cc8-a9bb-eeb89490db21/tovemiliduroroduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b73d154-477b-436e-981b-468a0d1dd813/olixar_sentinel_samsung_galaxy_s9_case_and_glass_screen_protector.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_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 5532 bytes
SHA-256: 223a998b03cbd2201751ca2930ad84da59404e6181b83b4f295d6dbc456b510e
font_01_sfnt_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 11436 bytes
SHA-256: 6b074ed30d9fd38a33ec204286876c54320fd9a13d2ae56da744ce031d5ba7d6

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