Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b18ee5ef0cfc87…

MALICIOUS

PDF

76.9 KB Created: 2021-06-10 19:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0792a3f5314e19d062b8c0c08ddaeae SHA-1: ce4f921262562392d1eac3f70ec6fb675b15d269 SHA-256: 07b18ee5ef0cfc87fd076eac68109ec90139d96cf83b6144ef933de3386888a9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. The embedded URL, 'https://huntic.ru/pbw?utm_term=vendor+termination+letter', suggests a phishing lure related to vendor termination. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are indicative of a malicious document designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://huntic.ru/pbw?utm_term=vendor+termination+letter
    • https://jexurelo.weebly.com/uploads/1/3/4/8/134853401/libazimomusijufugi.pdf
    • https://cdn-cms.f-static.net/uploads/4413243/normal_60279e9695a82.pdf
    • https://cdn-cms.f-static.net/uploads/4484399/normal_60c1d4d65c482.pdf
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fe78b4ca3769.pdf
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/2728637.pdf
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ffdc7dc935b4.pdf
    • https://pajilolupifi.weebly.com/uploads/1/3/2/3/132302794/sigedixomu.pdf
    • https://jobozisibipiw.weebly.com/uploads/1/3/4/5/134581899/kobezoxorolivo-jovobisokuniz-lebaxanogam.pdf
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/148c89.pdf
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5fc692603c9f3.pdf
    • https://geselumagema.weebly.com/uploads/1/3/4/6/134695037/e7bda736.pdf
    • https://cdn-cms.f-static.net/uploads/4408330/normal_601863809d3d1.pdf
    • https://sidusumidiwef.weebly.com/uploads/1/3/4/3/134366372/koxijopad_begatonofokol_lepaposesuvave.pdf
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/1e8ab9ee9.pdf
    • https://cdn-cms.f-static.net/uploads/4368735/normal_604f01906b05d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5a384cb2-08f5-46a9-a635-ec95d45b80ce/north_indian_side_dish_list.pdf
    • http://jufugoxula.pbworks.com/w/file/fetch/144633720/fedutisazokojoj.pdf
    • http://gafuxexosaru.pbworks.com/f/how_to_write_a_sentence_third_grade.pdf
    • http://tejipufiwuma.pbworks.com/w/file/fetch/145067955/pokemon_mega_adventure_apk_download_for_android_gba.pdf
    • https://uploads.strikinglycdn.com/files/aeac52cf-687e-4a52-83a8-94e0146919f0/gegufoxolixotibomuj.pdf
    • https://uploads.strikinglycdn.com/files/398084bf-827c-49d1-a33c-8cfece4f08c2/gebamukilovi.pdf
    • https://uploads.strikinglycdn.com/files/552c6aed-4aa3-4baa-a84c-d811401ff405/bobonevukujiji.pdf
    • https://uploads.strikinglycdn.com/files/aeb08dd7-989c-4c20-af89-44e5c4e10bb4/86908750512.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_off0000f198.bin
969efb3c2889ae7d242e09c195d4916312202bd5457b05299157e34e1b1d4d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 4756 bytes
font_01_sfnt_off000101a8.bin
74980de4b33a28ebddc93d20f22abf92f1d96ee3f4d5c342f8db654c3fcc8d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 10732 bytes

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