Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca31a8ccd753d90…

MALICIOUS

PDF

87.4 KB Created: 2021-03-23 08:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 991e443361cdee6c958b9d158283f813 SHA-1: deb5e51a60399cf02f71368f46c619e48e7b694f SHA-256: fca31a8ccd753d90f2c0b835a263da61fe009db81933f953bb3e6f0739e8dc7f
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, identified as a link farm, with the primary suspicious URL being https://lozipotod.ru/award?keyword=bhagavad+gita+in+tamil+translation+pdf. This suggests a phishing or spamming campaign aiming to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=bhagavad+gita+in+tamil+translation+pdf
    • https://cdn.sqhk.co/molavagew/bidjcqw/dovuwujeliwote.pdf
    • http://zuluwububoke.22web.org/puxivijazaxakapafunu.pdf
    • http://delojenopow.66ghz.com/gatujezamaxijeravosidi.pdf
    • http://zuvowizetigeko.22web.org/tamikovofajo.pdf
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/lojabij.pdf
    • http://raxojomaman.iblogger.org/tecnicas_de_redaccion_concordancia.pdf
    • http://sigefolaxapuve.22web.org/dominos_dough_recipe.pdf
    • https://bajomunimiru.weebly.com/uploads/1/3/1/0/131070213/fadexojesavenikazug.pdf
    • https://cdn.sqhk.co/norowitidot/ajgUtet/pallet_grocery_hours.pdf
    • https://cdn.sqhk.co/jesisoritet/fICiaib/centris_federal_credit_union_grand_island_nebraska.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6fd9314c-fcc1-4898-b530-4a5c8494a1c9/feminism_is_for_everybody_summary.pdf
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_e2bd3937ce3147d39421ec32a7bb1b89.pdf?index=true
    • https://uploads.strikinglycdn.com/files/42a32612-d5d1-4465-bf3f-17bc54ca9c7d/6204321104.pdf
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_956a8be88aba4e9aba6f2cebbe0ec4e0.pdf?index=true
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_d9c0f17569704035b56d5e3d41fd3ec4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eef0c220-79d8-4e64-bbed-eed86c15d460/lazavudagiw.pdf
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_fb7673a9cfc84945bb7778f0cae69df1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9163e20a-647b-41c2-a1ff-4de406f50179/dating_scan_accuracy_at_16_weeks.pdf
    • https://uploads.strikinglycdn.com/files/4eea770b-ab46-4a8d-8260-6fede0336afb/64166834293.pdf
    • https://uploads.strikinglycdn.com/files/e8b6ccc6-5551-410d-859f-c433e3fc0c7a/53589540728.pdf
    • https://uploads.strikinglycdn.com/files/a87839a5-472d-4a7f-bfff-78dcc4a0be64/rca_tablet_reset.pdf
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_ccb62d2365e54b839a2375b003939a9c.pdf?index=true
    • 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_off000109c7.bin
66d8ee353690ac978c2dfd89a03635e6d9ee43fbd91442f6f6be6e6e747a3f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 5236 bytes
font_01_sfnt_off00011b67.bin
28bd05ca9875365d94d4e62f1662d6f0d36315e4fc6e4d0ce31738bf6d857557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B67 11568 bytes
font_02_sfnt_off000141b4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141B4 4324 bytes

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