Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ee05374bc23d7d…

MALICIOUS

PDF

96.1 KB Created: 2021-04-12 17:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a84ba1023b89be0b36874c3ee3107f8 SHA-1: 828f762e8d645a6e4747f86e94e78709e5355bdf SHA-256: e3ee05374bc23d7df1fc246d516e5e864a5fe9a0c378605cda42ba6fb26412eb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs points to a phishing or content-luring 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://kuzutuzo.ru/strik?utm_term=do+they+ever+show+the+baby+in+rosemary%2527s+baby
    • https://cdn.sqhk.co/nufesewepi/jiarXaT/43440313912.pdf
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/jatuvak.pdf
    • https://cdn.sqhk.co/ruxuvedije/Ggjsh1y/metric_conversion_worksheet_1_monaco.pdf
    • https://vebokupamo.weebly.com/uploads/1/3/4/4/134494409/93c58d3ed042f2.pdf
    • https://nasuvanebi.weebly.com/uploads/1/3/5/3/135393195/0da9927f4784.pdf
    • https://cdn.sqhk.co/wogirujut/ggW79jO/fifilenabolipabufiwupiwus.pdf
    • https://cdn.sqhk.co/mugegiduveb/jUmcFdm/hard_rock_ringtones_for_samsung.pdf
    • https://cdn.sqhk.co/xokebuzizo/xTc1jf6/cardinal_wiseman_high_school_ofsted_report.pdf
    • https://cdn.sqhk.co/buzivafulet/uOlXgc5/lenito.pdf
    • https://cdn.sqhk.co/nakolore/icZjchd/elevator_counterweight_guide_rail.pdf
    • https://cdn.sqhk.co/kegufamop/j6ig6gf/gotanulig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a18d232-c592-4598-b0f6-27e173fb8507/elementary_differential_equations_rainville_solutions_manual.pdf
    • https://s3.amazonaws.com/neporezofov/bazuzamukopovux.pdf
    • https://f2182bdb-ca8e-4fe7-b379-f84e14eeb57e.filesusr.com/ugd/026bcc_bed5e2238d6844978e25d541e69b7287.pdf?index=true
    • https://s3.amazonaws.com/zatasipezeg/jasper_ireport_5._6._0.pdf
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_e94c5f7144cc4a58b2fc3952a682bd2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f19970bb-a8e6-4358-bd11-123f58b5040f/how_much_does_an_electrical_engineer_technician_make.pdf
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_0208c894bb7e44b0a4e795b214ff5e5f.pdf?index=true
    • https://s3.amazonaws.com/mubemutolewe/73387932051.pdf
    • https://s3.amazonaws.com/dazuxujepov/sad_love_shayari_video.pdf
    • https://s3.amazonaws.com/rirusozo/sijuwobinefemuforegewebot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b82.bin
a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 2900 bytes
font_01_sfnt_off000135c4.bin
ae53ec7d9d0617234b08f9e36216796617a6bd6bdfedac2d9fe2ef23eceb93a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135C4 5320 bytes
font_02_sfnt_off000147da.bin
9bfade2d1c5b217e45b3121d853ab274a288e788722c36fb0e3c881ff88c143c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147DA 12040 bytes

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