Malicious PDF — malware analysis report

Static analysis result for SHA-256 a573286c0d7d6778…

MALICIOUS

PDF

73.6 KB Created: 2021-03-20 19:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dac8d4e5eb022d5884502401aaf3b1ec SHA-1: ccdf24195c966961dcee59069040445812471867 SHA-256: a573286c0d7d677899aec02ba573c3841971d7ccee37a70014ec0216cfc62c6b
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a heuristic identifying it as a "PDF_SEO_LINK_FARM" and another indicating a "PDF_URI" to a suspicious domain. The ClamAV detection and ML classifier also flag it as malicious. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest it is designed to redirect users to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8022

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/award?keyword=affichage+obligatoire+entreprise+2020+pdf
    • http://heretythere.site/254177930367sgs8.pdf
    • https://cdn.sqhk.co/ditutafewaw/ScF9hjR/pocket_rogues_ultimate_apk_free_download.pdf
    • http://rewita.fun/como_atualizar_o_android_tv_box_mxq09h88.pdf
    • http://motivawka.online/817453789740ozlj.pdf
    • https://cdn.sqhk.co/kolokejo/fmugeRJ/apple_notes_icon_black_and_white.pdf
    • http://sakhavto.ru/baahubali_2_picture_videojsbts.pdf
    • http://zhk-rekord.info/91612277271m9v8l.pdf
    • https://cdn.sqhk.co/tusufawenu/RTicNXG/matchington_mansion_wiki.pdf
    • https://cdn.sqhk.co/kovezozeseg/yIUii1a/80869520546.pdf
    • https://cdn.sqhk.co/gojelonub/gdcHigL/wheels_on_the_bus_amazon_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_347c2ab05c234b0abf25b3ff12900342.pdf?index=true
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_42f2f8a9602b4408a589b46e7815e29d.pdf?index=true
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_6c9b896f9c554285b4fee7f897f1e351.pdf?index=true
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_bfd3d920374641409d3cc7ad08dcbc95.pdf?index=true
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_f9cfc7bda5824697b7ba0d44a13e010f.pdf?index=true
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_dbd6f8d477ff4c27bef7f5694034a28a.pdf?index=true
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_61ec786db28b473ab295ece449802ae6.pdf?index=true
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_10709455739f46ea9fc3890521189662.pdf?index=true
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_5cbf58f7d0294381ba6bc8d52393d932.pdf?index=true
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_3fe0827f1add43eeb540236bb98f11fd.pdf?index=true
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_04d39c1fa4624efbb106f5ac5d787a51.pdf?index=true
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_4845d9a27c054808a756a1f829def936.pdf?index=true
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_5ce12423a15e4cbab8fcb75c5082ad7d.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f6.bin
4512cd7ccc72e441ee15a8db1a60b8a3f27410103a8b3b8e407988ba4e0005c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 5820 bytes

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