Malicious PDF — malware analysis report

Static analysis result for SHA-256 434b5549ceee74ef…

MALICIOUS

PDF

84.5 KB Created: 2021-03-15 11:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a80fc275b4c76bbe97478cb8c8ed021a SHA-1: bff48209688ebc6aa27046952903b95e5ee74cdf SHA-256: 434b5549ceee74ef380bcb9462f727758bbd79b459a3f1c7de03cb3538f6350e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing pages, and the document's structure indicates it's designed to redirect users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/award?keyword=antonyme+deutsch+pdf PDF link annotation
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/togazu.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/M3Apihf/bike_racing_free_download_apk.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/682dc396a0.pdfIn PDF document text
    • https://marejeloxivel.weebly.com/uploads/1/3/4/7/134709382/nawosimepifakimupuk.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/2786978.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/jf6ggia/xogefenedazojarubigote.pdfIn PDF document text
    • http://helpcontactform.com/itunes_offline_installer_64_bity3xo4.pdfIn PDF document text
    • https://bepefuligifeval.weebly.com/uploads/1/3/5/9/135981888/92af48a606.pdfIn PDF document text
    • http://antonioit.fun/vorerobemegexejebimudejo81nic.pdfIn PDF document text
    • http://mon-fortuneo.best/mihail_sebastian_steaua_fara_nume3b6e5.pdfIn PDF document text
    • http://twenty-promo2020.ru/how_do_you_wash_braava_m6_pads8wkha.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/6F7g7ih/xoxilosa.pdfIn PDF document text
    • http://paganel.world/celestron_powerseeker_70az_telescope_priceztkh5.pdfIn PDF document text
    • https://jokozoxusatolof.weebly.com/uploads/1/3/1/0/131070378/8622420.pdfIn PDF document text
    • https://wotakowa.weebly.com/uploads/1/3/4/8/134885303/3559183.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jjVNqXE/48299339189.pdfIn PDF document text
    • https://cdn.sqhk.co/sexipemajim/ieheslZ/nesowovokujese.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/9797654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9e976baa-7a54-4579-a0f9-b266d5d2b773/cuanto_es_5_4_en_metros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f9e256-38ca-48c0-835e-d8be99e26c97/whirlpool_duet_steam_washer_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509e89bf-cfa2-4250-86df-cd5537ae7451/mujufulajisijamugugukubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012e4cbf-e831-44ee-a644-4ff0a1614b46/29405484573.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 4984 bytes
SHA-256: 7df4a3ea978280ca5fe1065cbcde436b102225be491fe2d97754e6aeaf766aeb
font_01_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 13664 bytes
SHA-256: 230b3e7a41e634c0bea6bde048f3ab830701d3a3e72fdd2dfa308fa2cf8da8a7
font_02_sfnt_off00013507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13507 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3