Malicious PDF — malware analysis report

Static analysis result for SHA-256 a229b2e174c315e9…

MALICIOUS

PDF

73.3 KB Created: 2021-04-01 04:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f058434270f41b0a7fc4f5c6576f03 SHA-1: b61a476faabbc56b79877281336ab3214a84e5e9 SHA-256: a229b2e174c315e9c4deed54b28420d4fd1c9037919b419e389acbf0caa19adf
196 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to suspicious domains and PDF files, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'PDF_SUSPICIOUS_LINK_LURE' highlights invisible links to suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://zajinet.ru/aws?utm_term=playtex+diaper+genie+elite+manual
    • http://afracheat4.xyz/504145019450k7fp.pdf
    • http://presentinsta.online/18151022186hl4oq.pdf
    • https://cdn.sqhk.co/xovujiroveg/jgi0Wjg/pixikumetonejosudeko.pdf
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/sunexefufopixez.pdf
    • http://springwin.space/kotidunojukolakavakakujbwgb.pdf
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/mixonukowob-sipopelow.pdf
    • http://pl50off.info/sozafowakokz757.pdf
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/fadurapubabe-monabako-pefonum-totoj.pdf
    • https://cdn.sqhk.co/woleparos/giggjji/42845405976.pdf
    • http://securitycheckingbrowservkcom.xyz/simplicity_regent_22_hp_44_deck_belt_diagramjpywh.pdf
    • https://cdn.sqhk.co/musarawaw/ghe2l7i/nba_live_mobile_basketball_apk.pdf
    • https://cdn.sqhk.co/moserusoba/zl3HhbU/twilight_struggle_headline_scoring_card.pdf
    • https://cdn.sqhk.co/karadirimose/jldUWtq/consultar_saldo_vale_transporte_rapido_luxo_campinas.pdf
    • https://sinegozedajosor.weebly.com/uploads/1/3/1/8/131871849/8665113.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2b2d5f06-5596-415e-846a-5a8de828570c/gosowogadewenu.pdf
    • https://uploads.strikinglycdn.com/files/a81f206d-e488-4f93-8b88-992ba505b9c5/lovex.pdf
    • http://gagimuludodu.epizy.com/sports_illustrated_cover.pdf
    • https://uploads.strikinglycdn.com/files/c32d8977-22c8-40d3-876e-318bbc4f1e07/quiq_hf_pfc_battery_charger_fault_codes.pdf
    • https://uploads.strikinglycdn.com/files/7f156ad0-e80a-4f97-a82a-e53f085beb38/senixukinebiguniwelanojam.pdf
    • https://uploads.strikinglycdn.com/files/6d0d2fc0-1cb0-4165-82b8-d91c1f708873/que_pasa_en_el_epicentro_de_un_terremoto.pdf
    • https://uploads.strikinglycdn.com/files/96aee94f-e5fc-4173-b1e9-32498248fafd/dd_5e_planescape.pdf
    • http://jatirud.rf.gd/mac_os_boot_usb_format.pdf
    • https://uploads.strikinglycdn.com/files/194aa842-8bea-42f7-b018-ea6018ecf7fc/their_eyes_were_watching_god_chapter_9.pdf
    • http://xapipapuvujefo.epizy.com/befupiw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de90.bin
7ffd6c8898ede5e5a18fecb9b3cee4231672771fed9af7c197bd2a6715cd91b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 5272 bytes
font_01_sfnt_off0000f07b.bin
c15c568d7e2a3bd66e6a61e1596fb095247d89ff81c63b71e0ca92e5f44890ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 10976 bytes

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