Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf47b440493fd14f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 13:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 878c21bca68dedde2d4b5826bee50d1a SHA-1: 714e0a8c1f5e4ac49fe8ca0914847266f06b1d9d SHA-256: cf47b440493fd14fc92338dbcd9bb1e53ca179a5eb75465fbd7d85523bc4de95
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://witatubaf.weebly.com/uploads/1/3/1/6/131606367/vezisekinijitisefovi.pdf'. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=maytag+bravos+quiet+series+300+washer+owners+manual
    • https://witatubaf.weebly.com/uploads/1/3/1/6/131606367/vezisekinijitisefovi.pdf
    • https://cdn.sqhk.co/kaxejelun/1TFgdgf/santorini_hotels_with_private_pool_oia.pdf
    • https://cdn.sqhk.co/juxezijafoz/hdjhjfX/kanto_yu4_manual.pdf
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/mapoziw_rifid_ropobidevefifas_bomowoliwusa.pdf
    • https://cdn.sqhk.co/xubupigegi/hcjfgiP/saxodadul.pdf
    • https://cdn.sqhk.co/nasanoroge/cgexjia/70238826830.pdf
    • https://cdn.sqhk.co/nivavepe/giajhhg/sandwich_places_near_me_that_cater.pdf
    • https://cdn.sqhk.co/wejagamewo/icQyKnu/25354933001.pdf
    • https://cdn.sqhk.co/xekemini/jggghc7/horse_riding_tales_ride_with_friends.pdf
    • https://cdn.sqhk.co/xenumobavun/R0higey/19445312069.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7665bbe0-4707-430f-a2b6-015917579273/wonituzuwawaxo.pdf
    • https://uploads.strikinglycdn.com/files/8a2bba13-b217-41f2-8752-3222d439234e/lakshmi_ashtothram_lyrics_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/931c9247-9ac1-452b-ba54-cb884bb0a04d/how_to_plant_sweet_potatoes_slips.pdf
    • https://uploads.strikinglycdn.com/files/8c20f4c9-3a1f-4840-bf14-0370d64d3a52/simmons_sd5k_power_supply.pdf
    • https://uploads.strikinglycdn.com/files/9b7c97a2-4cb9-4154-a232-01e86bd39ec8/savisadisixul.pdf
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_c185e37f24604524b6a850b4f05ad574.pdf?index=true
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_2c92eac234454843a0b26939f5fb2c68.pdf?index=true
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_fbc78262b8e4484cb8e0197761238159.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_off0000e725.bin
11bdeb953043e8123e74fc8a4c1ceda35508adac646fedb445a9d7e5e1b803a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 5812 bytes
font_01_sfnt_off0000fae4.bin
30c3ffb13f0dcf5141007d1b37fc4ff3b0d978dd9a6b5508af2aab445d97f454		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10556 bytes
font_02_sfnt_off00011ed1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED1 4324 bytes

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