Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f06288babf8414…

MALICIOUS

PDF

84.0 KB Created: 2021-03-17 11:35:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b304d3f1a2e187a4196a8ef621cb1be4 SHA-1: d1373723f501ae536fd2d52ee2e948366ec06815 SHA-256: 85f06288babf8414cc4bd79b8c090ba97b63ca36a1b55379d17270b2d32aa613
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 'http://fazodavevonexo.rf.gd/17633497030.pdf'. Another heuristic, 'SE_INVOICE_LURE', suggests the document's content is designed to trick the user. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/award?keyword=az+100+dumps+pdf+free
    • https://cdn-cms.f-static.net/uploads/4446395/normal_6009f07f3c135.pdf
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/sekerefisotix_tujugi_zutafaga_buvefazafa.pdf
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fefa5ba6efdf.pdf
    • https://cdn-cms.f-static.net/uploads/4530846/normal_5fe66d76aa972.pdf
    • https://cdn-cms.f-static.net/uploads/4459034/normal_6027ccb13b4fc.pdf
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fe2da912fbf6.pdf
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5ffce0a188b4f.pdf
    • https://cdn-cms.f-static.net/uploads/4502833/normal_604813250302c.pdf
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6045ef06161c6.pdf
    • https://zulasiromeg.weebly.com/uploads/1/3/1/4/131453934/273008.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fazodavevonexo.rf.gd/17633497030.pdf
    • https://uploads.strikinglycdn.com/files/baec9b2b-93dd-401e-9399-b1ceb4723fb8/how_to_unlock_iphone_5s_tracfone_for_free.pdf
    • http://pewesinelukaveb.epizy.com/poe_atziri_run_guide.pdf
    • http://gebuzabode.epizy.com/zipawulunaseletogalikevu.pdf
    • https://s3.amazonaws.com/jevelel/metro_2033_redux_walkthrough.pdf
    • https://uploads.strikinglycdn.com/files/d256c9c4-d252-4d49-8cc5-5c3a475dfc66/john_deere_z425_problems.pdf
    • https://uploads.strikinglycdn.com/files/8fa02282-7d92-4f80-9b39-0b2376b9a89e/go_go_scooter_battery_box_removal.pdf
    • https://s3.amazonaws.com/wixamupelinere/tamilrockers_2017_hollywood_movie.pdf
    • https://uploads.strikinglycdn.com/files/bcf95413-5612-4d51-87be-a57766a3f26a/gujenifiderusejotebosa.pdf
    • https://uploads.strikinglycdn.com/files/1c0a20a3-6a99-44b5-b8bc-93503f96e048/como_crear_un_interactivo_gratis.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
    • 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_off0000e756.bin
a33a4fc40a983f69fda7853dc520a143bd72ff03423af359328bc75f1738c02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 4716 bytes
font_01_sfnt_off0000f759.bin
8dabb9a720f534d1e4c04a99c3fab74811f5c6e73738c18b7345265fc4bd9b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 11676 bytes
font_02_sfnt_off00011f62.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F62 16144 bytes
font_03_sfnt_off00013462.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13462 4324 bytes

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