Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d9b0fc6eced9a5…

MALICIOUS

PDF

114.5 KB Created: 2021-06-01 13:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b8ca88d37bca0ebd4e3e4c2462ab80c SHA-1: 1692c31d0ccc064e31e1fa005adbeb29465fb593 SHA-256: f3d9b0fc6eced9a5a7979ee441b5db05092986ba1f81cea652795be6d67fdf4e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/123?utm_term=algorithmic+and+high-+frequency+trading+pdf PDF link annotation
    • https://zezupivipikoko.weebly.com/uploads/1/3/4/5/134596705/4656275.pdfIn PDF document text
    • https://luselovuxetox.weebly.com/uploads/1/3/0/7/130739290/dukagalidov.pdfIn PDF document text
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/0eb387e5.pdfIn PDF document text
    • https://mosatidopo.weebly.com/uploads/1/3/4/7/134731439/teguguxumo.pdfIn PDF document text
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/lupezudepeti-temufezaxo-moninuzute-burus.pdfIn PDF document text
    • https://nanarazoru.weebly.com/uploads/1/3/4/8/134859944/lekitep_lobazu.pdfIn PDF document text
    • https://ronuviwa.weebly.com/uploads/1/3/4/5/134587060/tizewofiliw.pdfIn PDF document text
    • https://kovozewiridudu.weebly.com/uploads/1/3/0/7/130738567/bozudukezabeludifam.pdfIn PDF document text
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/6c4d3d83.pdfIn PDF document text
    • https://zodosixuwe.weebly.com/uploads/1/3/4/8/134863902/e847f1f24a.pdfIn PDF document text
    • https://dugilosokufaku.weebly.com/uploads/1/3/4/6/134610324/607d798.pdfIn PDF document text
    • https://guvoxokogavi.weebly.com/uploads/1/3/4/3/134374443/5375561.pdfIn PDF document text
    • https://voxapuxunud.weebly.com/uploads/1/3/1/3/131381802/3157115.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/3348225.pdfIn PDF document text
    • https://xezolemi.weebly.com/uploads/1/3/5/3/135324657/zosufep.pdfIn PDF document text
    • https://kasutuwisuruja.weebly.com/uploads/1/3/1/8/131872017/bokukuruzotit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zabodovojif.pbworks.com/f/jesus_bleibet_meine_freude_noten_klavier.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/nscdc_shortlisted_candidates_2020_for_physical_screening.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/stick_fight_archer_mod_apk_unlimited_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e6e0b0-ed0f-4377-a5ee-2e8909b07b79/kanejixapin.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/99477554620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec64aab-318a-49ac-8655-51e2caea6fd3/56469466071.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144439932/dramatic_irony_in_the_odyssey_book_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd3b915-5af5-490d-b556-9ef5598259e4/podukaxidekes.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_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 53520 bytes
SHA-256: 173f1af8b0f00746f2ccdf50781b55bfbc06109c592c2e8d4054890e19590408
font_01_sfnt_off00018495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18495 5640 bytes
SHA-256: 0cce6844dffa923841d84445c0f676b7d9cc485db164b0fd8c2fab004e8a7f9d
font_02_sfnt_off000197a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197A8 10740 bytes
SHA-256: 19c5d65874e3631d667d242f5997d5a2dc74b38b4db08405888dd34404dbd159