Malicious PDF — malware analysis report

Static analysis result for SHA-256 4840a75e2c146eab…

MALICIOUS

PDF

77.2 KB Created: 2020-11-20 06:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f166327ee85195269bbeeb3ee57f83a6 SHA-1: 1b52cb1625208cdac98b69661bfd35f77a24a6cb SHA-256: 4840a75e2c146eab7d498ccfeba974d38cc33eebe96516a46d3c62535a01879d
156 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=andrea+brillantes+scandal+torrent
    • https://cdn-cms.f-static.net/uploads/4387706/normal_5f94790b21d0f.pdf
    • https://cdn-cms.f-static.net/uploads/4489050/normal_5fab1949c2b7c.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/defelux.pdf
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f87517a3f182.pdf
    • https://cdn-cms.f-static.net/uploads/4402712/normal_5fa190f6d81a6.pdf
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fb7177d38551.pdf
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f8aaaf984ab9.pdf
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/9301630.pdf
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8852a501aca.pdf
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f9c6bf7d5401.pdf
    • https://cdn-cms.f-static.net/uploads/4421207/normal_5fa0e27071027.pdf
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fa8f25eb6dcc.pdf
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/3666585.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5f9f884b8e5e9.pdf
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f961cee36ede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zafirawit/ligimesivebur.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd3b.bin
120dfd7c7977cfb9a90e0c19aa24ce80f3ad63f69756627d616fe21accc03e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3B 6424 bytes
font_01_sfnt_off0000cd1d.bin
a9290144a7e32098562d0586670e706392537c564b9d6ddb324914018acf44df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1D 5060 bytes
font_02_sfnt_off0000de4e.bin
824cf6986215839bbca3e592d14cd287e0bcd64d06e2b178e39c6cfdc5fc04c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 4580 bytes
font_03_sfnt_off0000eaaa.bin
9bd4fc74c562a1c738118924f356a647790ff619244cf4815698c28084bd42c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 10944 bytes
font_04_sfnt_off00011053.bin
aeaa40c270cfa8c8a1ebcb09df4c7732145c87bc602cf0e06a448e3a59d97835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11053 16520 bytes

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