Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76e1bcec2f97aa7…

MALICIOUS

PDF

82.0 KB Created: 2021-03-13 20:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb8da11207e60bee4309764c36d01d6 SHA-1: 9ffc40a05d4e344344f1f287a2a99ecc39672dbb SHA-256: a76e1bcec2f97aa7f723caf326eb344eb3f7ffc9d760ee91dfc1755780e44c5c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely intended to direct users to malicious websites for credential harvesting or malware distribution. The embedded URLs, such as http://megantv.site/..., are consistent with this phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=letter+size+in+pixels+72+dpi
    • http://megantv.site/what_are_books_called_that_are_based_on_true_storiesor4v6.pdf
    • https://cdn.sqhk.co/kubotafot/ghGhgjj/filmywap_2017_bollywood_movies_half_girlfriend.pdf
    • http://atelier-spb.com/shoprider_streamer_wheelchair8f56p.pdf
    • https://pekeweluxema.weebly.com/uploads/1/3/5/3/135304067/dunoboj.pdf
    • http://6gusevshop.space/412374692257cps8.pdf
    • https://wulafuxuzezam.weebly.com/uploads/1/3/2/3/132302924/acae7fd4588795.pdf
    • https://cdn.sqhk.co/mitejapeki/rghtzvJ/unicorn_dash_old_version_game_download.pdf
    • https://cdn.sqhk.co/kominepoli/jiddugi/xasupetegijogomufo.pdf
    • https://cdn.sqhk.co/pomorezolo/QifgNnn/budajofevesobemudemet.pdf
    • https://vukuwapebu.weebly.com/uploads/1/3/5/3/135310377/figabaz.pdf
    • https://cdn.sqhk.co/jokawefezo/jhBajiM/ripabafewikanupuselibogas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_0a6c5600ee614eefb89dcb94bf26a0cd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c5075bef-0672-4455-876d-4a505fdc196a/what_does_white_smoke_mean_on_a_diesel.pdf
    • https://uploads.strikinglycdn.com/files/a64cab29-3dcb-4f99-8ba9-79dd3e5caf08/52039674112.pdf
    • https://uploads.strikinglycdn.com/files/1389ebfe-9e34-49f0-9b4f-fb12f92f8076/nepeseretelogodus.pdf
    • https://uploads.strikinglycdn.com/files/f643bc3e-89f9-4cb4-8bd5-195e8e57f820/10184919072.pdf
    • https://uploads.strikinglycdn.com/files/147b04be-209c-4297-a251-2c01297fe087/dibetugikifutujiz.pdf
    • https://uploads.strikinglycdn.com/files/a866676b-6cc3-4e63-a2e1-dae3dbbaafd4/how_to_change_battery_in_schlage_smart_lock.pdf
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_4d0ebd80cad24c77b05adf98cd3c0179.pdf?index=true
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_de35a3afca9147a8bc1614ff51496df8.pdf?index=true
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_8d61a9d1dc05428e901105b1708c2c11.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1267ccf2-cc00-4b60-b5e2-b6745069463b/110.1_conversion_to_icd_10.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_off000101ec.bin
383d32f601e290d538ac6b70b9988a47ddfb522e1ae11838a00e73dccf8e7c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 5012 bytes
font_01_sfnt_off00011324.bin
610c54cb1f4d0fb3f269467c907ee34fd6436090f48b3898f5eab9e4d72cc928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 11464 bytes

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