Malicious PDF — malware analysis report

Static analysis result for SHA-256 059a275365ae97f5…

MALICIOUS

PDF

71.7 KB Created: 2021-04-07 18:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a992bcf7c8679dd6bb1c265e034178c SHA-1: d2ec765f7dabe5b021acd0a0d94d3424f7499ae1 SHA-256: 059a275365ae97f5ff19f16256b7fcf47a3d2cf41dc421719c099ec17a9bddcb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' and the presence of many unknown URLs strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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
  • 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/wix?keyword=england+and+its+colonies+guided+reading+answers
    • http://siwupojotuj.getenjoyment.net/adobe_reader_free_download_for_windows_8.pdf
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/6193109.pdf
    • https://panesiwosejel.weebly.com/uploads/1/3/0/7/130739396/pumitapivetatiwopi.pdf
    • http://rejamar.sportsontheweb.net/96810470675.pdf
    • https://bemawupi.weebly.com/uploads/1/3/0/7/130740003/wemuvatozino_vowuduvukop_depowimoxum_lagolivino.pdf
    • https://delitulasuv.weebly.com/uploads/1/3/0/7/130775658/8d2d18df.pdf
    • http://xivekoto.medianewsonline.com/explosive_strength_workout_program.pdf
    • https://wijinopupog.weebly.com/uploads/1/3/5/3/135323990/wepifir.pdf
    • https://xegubivagemegi.weebly.com/uploads/1/3/4/4/134481439/4276908.pdf
    • http://xuwuvewisin.mypressonline.com/28151814832.pdf
    • http://penageli.getenjoyment.net/agile_methodology.pdf
    • https://jowatewiko.weebly.com/uploads/1/3/1/3/131380225/759946.pdf
    • https://vudolexululuj.weebly.com/uploads/1/3/1/0/131070894/d903b02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/likerajatob/aspiracion_de_secreciones_en_el_recien_nacido.pdf
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_b705c2dfe1704998b7dc8e8771592b3e.pdf?index=true
    • https://s3.amazonaws.com/purawuma/81230427329.pdf
    • https://uploads.strikinglycdn.com/files/1e68f446-8e54-469f-8a90-683a57fb3f12/fimeketozajunaxewe.pdf
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_93e5f34926994201835d8b7e0ce45e54.pdf?index=true
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_144c6c85229e4087a7008d02440afe5d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/167b785f-3525-4695-a9f2-ab344cf12369/14745101361.pdf
    • https://s3.amazonaws.com/gulapore/xovefefubuvogesemif.pdf
    • https://s3.amazonaws.com/makixibawumebol/35463820682.pdf
    • https://s3.amazonaws.com/jusuberu/gamuxanurakukoruzupetake.pdf
    • https://uploads.strikinglycdn.com/files/05600b58-5cad-4d2a-a510-8cfd2bbe7010/what_is_the_remote_code_for_my_toshiba_tv.pdf
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_9608d25f17a54841be2c625356e05d5f.pdf?index=true
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_5cb45e7052ca4cb89548d17e1ec12f4f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/07534645-8ea4-4fb6-91a5-0dd2e76b7684/is_there_a_difference_between_a_buffalo_and_a_bison.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4c.bin
81dedb22520820fa940961b5d8bd4d3e9ce272645bd1df9496198f6d5485efe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 5156 bytes
font_01_sfnt_off0000edf7.bin
f6afbba039e57850acb86fae8531fc2504c981f87bd3b21d53a557ac28a4897a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 10232 bytes

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