Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e43f3669e9892a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-28 10:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ca9c18e58c94253426ea5759a63f5fea SHA-1: baa1930e0e01923f3278158a97073ded0423e7f1 SHA-256: 29e43f3669e9892a5f13e1709f45fd8aee5ac6d237cfe86fa6630218edd75894
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links, likely to redirect users to malicious sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an intent to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/award?keyword=astronautics+the+physics+of+space+flight+3rd+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366653/normal_60503fb3d7040.pdfIn PDF document text
    • http://luminar3-download.xyz/dosuvutemobixutolagovidonqnncm.pdfIn PDF document text
    • http://getveran.site/digozasavoxowisojorspbhp.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/n4Fhha5/94225101229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5fdbb875c514d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_60089bf25cc49.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/ivNOYhj/lixusidefolipapobepiz.pdfIn PDF document text
    • http://ideaita.fun/bavesebikanijuwd52w7.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/YVgfhc8/shark_attack_movie_2011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_6043ecf3d6019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_601fb8f2dd555.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/mijil_gageturibav_neruta.pdfIn PDF document text
    • https://gojefizabefav.weebly.com/uploads/1/3/4/8/134890321/wilor.pdfIn PDF document text
    • http://rankingcoach-apps.com/how_to_write_1000_to_2000_numbers53cjb.pdfIn PDF document text
    • http://tiwikif.22web.org/how_to_store_kitchenaid_mixer_attachments.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vogurapake.epizy.com/meiosis_ii_results_in_the_formation_of.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/cisco_ise_3515_configuration_guide.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_16e6492a16244bee93c74617941440e2.pdf?index=trueIn PDF document text
    • http://wikotutagor.epizy.com/garmin_gps_etrex_10_price_in_india.pdfIn PDF document text
    • https://291e86d0-b4b7-455e-aeca-30cd05102b29.filesusr.com/ugd/384a46_96077b5b281849119dc1d05a87e660c3.pdf?index=trueIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_bafa329d7012448095d3f21ff2b4efc4.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_dbbf0c2a4da84a1d820bf7f3aef0af12.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_601bf13d2e14455dbde2c56874b5a4a9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD238 5552 bytes
SHA-256: bd015d1f826adf6f5e3d953159b5076b818da12b1fc857239c70743307c594da
font_01_sfnt_off0000e519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE519 10476 bytes
SHA-256: 2dd3a2c7399037b4041e714daf991b6d492bbb9ec43c4835d3ffff1eae292811
font_02_sfnt_off00010877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10877 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3