Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5c55127da74a67…

MALICIOUS

PDF

181.8 KB Created: 2021-03-21 11:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a3bf596e037291ce09fa5dd4db65324 SHA-1: d2e7950eb8480eb4a95ae13f5a83b581273add64 SHA-256: fe5c55127da74a67aa435e30eead828984a4b06fe0bc7fccee85af7718ac1fb5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting a lure.

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://midufefew.ru/wix?keyword=saturn+transit+2020+aquarius
    • https://cdn.sqhk.co/veludewozen/c30dgcb/free_back_pain_exercises_video.pdf
    • https://cdn.sqhk.co/kogoruzojif/jJmwh3T/bumubitarifixeborar.pdf
    • http://jakugurotugalow.22web.org/rivobuz.pdf
    • http://steelsho3.club/the_professional_chef_10th_edition_p2x9fg.pdf
    • https://wubiwadodeta.weebly.com/uploads/1/3/4/5/134577579/2b50f.pdf
    • https://cdn.sqhk.co/rawatajizefu/mYgcMja/somusozifawagutu.pdf
    • https://cdn.sqhk.co/kelopifagisu/iAhhs17/36127701749.pdf
    • http://medtechnika1.ru/5054602594j5jqi.pdf
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/c22f3b4cabb6.pdf
    • http://vujidiwasuxagi.22web.org/99350168990.pdf
    • https://zepiwifolu.weebly.com/uploads/1/3/5/9/135965208/3dc9e93527485e.pdf
    • http://tofabukusakuni.22web.org/lagu_alffy_rev_sea_games.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_07846517aff2436b82ec6284d25de06e.pdf?index=true
    • http://kuzebelinebofe.epizy.com/14988999269.pdf
    • http://wuvopopimuwes.rf.gd/lezupuwugat.pdf
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_de50026fc6344db9932898fb418625b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ad4a7fb-3342-4453-b4b9-6d26eddf061d/chemical_formula_of_binary_ionic_compounds_sheet_1_answers.pdf
    • https://uploads.strikinglycdn.com/files/bae97028-4218-440b-b404-5da846aeb2f4/dell_poweredge_2950_server_memory_upgrade.pdf
    • https://uploads.strikinglycdn.com/files/09b60ba4-dfb9-473d-8604-99786a9e2299/vocabulary_workshop_level_d_unit_3_answers_quizlet.pdf
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_89c6b91666104017bd8f7b2b5d11c02f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a513883a-dcab-4e58-abec-de7b41148e74/37897220495.pdf
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_29ead5c6d7d147b29ef4a59b410c66b8.pdf?index=true
    • 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_off00028fc2.bin
35cfc1d6a038a92137359b8f454fb1c20620a4ef1dde51ad041fc8185d081c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28FC2 5152 bytes
font_01_sfnt_off0002a151.bin
ae51f2ee9ec15558b1cc21b86db9e816331c741c40cc8fbb05e47f28a90b2cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A151 11240 bytes

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