Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a39a46b5211e396…

MALICIOUS

PDF

73.9 KB Created: 2021-04-27 10:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9a7fe0d48f665c749656d93d92c90e8e SHA-1: 2725d9b40427a3515f2338dd3db714708ba25576 SHA-256: 6a39a46b5211e396a49a25e45412f604cce1ed8468f3c183219285f0c46a1703
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple embedded URLs, with one specifically designed to mimic a search result for a common query, likely to trick users into clicking. The presence of numerous links and the use of disposable hosting suggest a link farm designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/strik?utm_term=how+much+is+a+55+inch+tv+wall+mount PDF link annotation
    • http://kavuwabu.22web.org/xiwafuwefefesewuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/cjeWRjb/71583358982.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/petsafe_shock_collar_instructions.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/ancient_history_notes_for_upsc_download.pdfIn PDF document text
    • http://niverokime.iblogger.org/94548515192.pdfIn PDF document text
    • http://lipazegeboludep.sportsontheweb.net/49619352724.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/pKgelgi/jedafow.pdfIn PDF document text
    • https://cdn.sqhk.co/papovezegep/hJjfQXA/devotional_songs_telugu_ringtones_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_37f489ba464d43db8cdc7a486f98e18d.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_3e81df3b6524489bb9cb98fa6e03eb20.pdf?index=trueIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_a0af8765beb64a289a8d9ba114167a91.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_a0a5e54e39ff42228cadaa05df21ab2b.pdf?index=trueIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_2def60ed5faf43df8c3db8b77ba59792.pdf?index=trueIn PDF document text
    • http://zelalosiker.rf.gd/nosocomial_pneumonia_guidelines_2017.pdfIn PDF document text
    • http://nukigusesirujop.epizy.com/wolf_handbook_2018.pdfIn PDF document text
    • http://suxorodefis.epizy.com/68036721771.pdfIn PDF document text
    • http://sobakijej.rf.gd/ansible_ubuntu_14._04.pdfIn PDF document text
    • http://sulupajus.rf.gd/whats_asana_yoga.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_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 5180 bytes
SHA-256: bf5ea9326164d8d5174a11a9d35f36dfdaa7581a1d743e5edc5d01a0e04462ca
font_01_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 11336 bytes
SHA-256: 47e9486be7c261336a6cb0f9fc851b76a64bea7023c5a8b610e68331e41e00ce

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