Malicious PDF — malware analysis report

Static analysis result for SHA-256 e656d15bb8ed74a3…

MALICIOUS

PDF

92.2 KB Created: 2021-03-30 02:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8e495df701c342f78108e0932e6c3fee SHA-1: 26cde518eab39341aa3d2e1b2a0ce89e5f593ae6 SHA-256: e656d15bb8ed74a31b559df2d328419890d2a189ad12228b08fc5f9a0c7f7a13
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and uses a deceptive title related to translation services. Heuristics indicate it's a link farm and ClamAV detected it as a phishing trojan. The presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=is+the+esv+a+good+translation PDF link annotation
    • http://voninizi.iblogger.org/vawiraxowixorenigutu.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/3ee29d06-dbb8-460c-879d-9db1aa29ef39/does_audible_have_gift_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9de7d37-93ef-4790-a089-dae9ccb3701a/how_long_to_run_first_marathon.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/36862579208.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_1c38d49d0d004c9f9e70e80dc9ff5078.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f256d5-da9b-4097-aed9-0a0f61c9cefd/what_jobs_can_you_get_with_a_bachelor_degree_in_international_business.pdfIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_610cdc9fd37e4045a35edfe2c9008c55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wurivuve/79940886910.pdfIn PDF document text
    • http://rudufegasavu.rf.gd/92802190212.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/nifejufoxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fbde90-d807-4496-8e55-8896b1240bc8/how_to_use_headphones_on_a_sanyo_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0168bb2-c1ed-442b-a55a-312a5bbc31b4/mutants__masterminds_3rd_edition.pdfIn PDF document text
    • http://numapev.rf.gd/makalah_hakikat_agama_islam.pdfIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_71c1f54cdcef44f398b9b31bbe1ec1ff.pdf?index=trueIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_62fbc014d8514e7b91035770d273e85b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3751cc-bb1f-481e-87bd-0f57eae1a6b2/mary_rowlandson_a_narrative_of_the_captivity_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781386e0-c31c-436e-959f-56a8c3ba7510/united_states_military_aircraft_national_insignia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0354ee-56a4-4d41-a581-3d9bf073e27c/kenurubumesapiwarolasabuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b028e8-0156-4638-901b-c828fa017b55/how_to_program_new_directv_remote_to_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0d9030-cff1-4476-9f30-731c40206cc6/virginia_woolf_novels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2c5e50-f4fa-41fc-819d-dbef474c84e8/best_free_gps_app_for_iphone_without_internet.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_eb58a6d3948f47b58bf69c32e10a2c75.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/10235046-82ca-43bb-8cd3-c1501500c09b/woxirofinodisabolidagonuz.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_off00012bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFB 5084 bytes
SHA-256: 0197ef1ff5ca885c2051dd7a33b4b3174cd432f56718a45cc260c45241b47905
font_01_sfnt_off00013d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D42 11820 bytes
SHA-256: 675fa0ca478e3593829af0704cc268f377ca1e54fb30c98e52b56ca7be8e0286