Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb229a8f4fc95b0…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 09:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb4fc869d8b68e97d3567d7dcc692537 SHA-1: b04ab1036f13860f3b509ea1ed00d0912b3ef978 SHA-256: beb229a8f4fc95b084cbb41cd7245f822cd2d075d0b78b97e1b6357a13c1187d
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, appears to reference the same test as the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=dr+cal+lightman+microexpressions+test
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fc851ecc510a.pdf
    • http://ladebizelase.scienceontheweb.net/american_gods_book_1.pdf
    • https://cdn-cms.f-static.net/uploads/4470040/normal_600a592a9e2bd.pdf
    • http://mikovil.mywebcommunity.org/the_game_awards_voting_results.pdf
    • https://cdn-cms.f-static.net/uploads/4445104/normal_6020d70bce4d8.pdf
    • http://smartcreditcheck.info/is_comptia_a_necessaryk9vah.pdf
    • http://jivavesomuviz.getenjoyment.net/beginner_strength_training_at_home_no_equipment.pdf
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5fecf7ba968f1.pdf
    • https://cdn-cms.f-static.net/uploads/4494648/normal_5fd6c43ab3c27.pdf
    • https://cdn-cms.f-static.net/uploads/4467950/normal_603cf6192cbf2.pdf
    • http://wejuveziwep.mypressonline.com/lutuzulaputaje.pdf
    • https://static.s123-cdn-static.com/uploads/4448538/normal_5ff6af8e9a818.pdf
    • http://help-bluebadgecenter.com/microbiology_jobs_salary_in_uaev5hx5.pdf
    • https://cdn-cms.f-static.net/uploads/4470533/normal_5fd3d5e52a56d.pdf
    • https://cdn-cms.f-static.net/uploads/4459935/normal_5fe8cad826a35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/timituvupame/infamous_2_ps4_trophy_guide.pdf
    • https://s3.amazonaws.com/vukumesoj/45725411286.pdf
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_ba9d5225f15c49d0a1743b13ce0e7458.pdf?index=true
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_289110338e3c4420b5c36dc94a17d6ca.pdf?index=true
    • https://d572dbd6-ec42-402e-884a-3db6daac2318.filesusr.com/ugd/6a558d_d851873722fa41349a0b6139b6c3402f.pdf?index=true
    • https://bc881323-2374-4635-a2b7-f126f9929bd8.filesusr.com/ugd/546a35_d24c3f47032b4c71ae1aef0d56fa2c6c.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_43e868edfef04f18974e88eb4b0a5762.pdf?index=true
    • https://s3.amazonaws.com/godoremitiwuja/nonconformity_in_iso_9001.pdf
    • https://s3.amazonaws.com/megujobemegor/honda_eu2000i_low_oil_sensor.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_off0000ec7e.bin
2a9d65e90a57906708253ba8c2dc4d32317b8006b609488860dd634fa0787b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7E 5416 bytes
font_01_sfnt_off0000fec7.bin
4d23a4a671cc450617e4828a52fe0235379861ccc1fcf353b2fe21fd106aeb6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 11280 bytes

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