Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e36596d4e279c66…

MALICIOUS

PDF

93.5 KB Created: 2021-03-19 05:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdee3e0ee9085b47cd70a36d2dcd77b3 SHA-1: 746ba44f705ee31281773ddade3f6377d81cc3f5 SHA-256: 6e36596d4e279c66f83fe63aeced73a964b636c40a1df91c6e28b03717953699
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to an 'answer key'. The embedded URI points to a suspicious domain, likely intended to host a malicious payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/wix?keyword=spanish+2+final+exam+answer+key
    • http://lozipazom.sportsontheweb.net/6570973071.pdf
    • http://tideboweped.medianewsonline.com/raiders_of_the_lost_ark_transcript_story_conference.pdf
    • http://help-lnstagramcopyrights-verify.com/is_class_c_airspace_msl_or_aglzlwze.pdf
    • http://introdom.ru/war_of_galaxy_wiki_fandomi5xqa.pdf
    • http://fishing-rods2.club/bachelor_of_commerce_accounting_major1o53u.pdf
    • https://cdn-cms.f-static.net/uploads/4375528/normal_6017b19292d67.pdf
    • http://levitajagukog.scienceontheweb.net/dolur.pdf
    • https://cdn-cms.f-static.net/uploads/4393911/normal_60127fee39133.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_470646564e054b06a2e86196f0f5c56d.pdf?index=true
    • http://nogobixa.epizy.com/two_syllable_words_with_closed_syllables_worksheets.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_e6cd5acd4940421bb139515b22d5710f.pdf?index=true
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_40744879e2604a52a670372b89401439.pdf?index=true
    • http://xemozof.epizy.com/git_command_line_cheat_sheet.pdf
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_929a249658d7419e82e13055d0143d73.pdf?index=true
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_651a09671c914c069906a392c9e2ea66.pdf?index=true
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_d2bece95f58e455a94cd8289c9370282.pdf?index=true
    • http://jibimom.myartsonline.com/ina_thrust_bearing_catalog.pdf
    • http://rojikigekon.epizy.com/1254036095.pdf
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_d6a48a23561143c0b93d9c84a7e31015.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_4bf3725a8cd64e9abedb3bc514745f8d.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010481.bin
9c3c109123b5dca55f9c1f25257a97d726bc29e66c4e62f035aceeb085add1e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 5300 bytes
font_01_sfnt_off0001165c.bin
f9ab43889b4346f57668e19c75f1292b0c6d0dfeb64cdcefeb9d6301b0103784		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 12392 bytes
font_02_sfnt_off00013f65.bin
5d2dfdf535204970cdfeeecfc9d441c3a361d4a52dcca27c0dc7593950cb9c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F65 17660 bytes
font_03_sfnt_off00015870.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15870 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.