Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce6f67e1fcde7d8…

MALICIOUS

PDF

74.1 KB Created: 2021-03-10 15:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 35a4406437d46242559cd77974f2c94a SHA-1: 5392d9cd48ab59586db7c3a3591d5e9da5b918a9 SHA-256: 4ce6f67e1fcde7d8a88b83aa00593122f5a88f36eed4ffbad18ae9de0928d630
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URL 'https://xezojetit.ru/award?keyword=acute+myeloid+leukemia+pdf+2020' indicates a potential lure related to medical information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=acute+myeloid+leukemia+pdf+2020 PDF link annotation
    • https://cdn.sqhk.co/rufebumu/hbhhtvd/67135391656.pdfIn PDF document text
    • https://panebelodoz.weebly.com/uploads/1/3/4/6/134619461/judugeraxe-puvatonomanogo.pdfIn PDF document text
    • https://xawoveramexu.weebly.com/uploads/1/3/4/0/134095940/vopixerik.pdfIn PDF document text
    • https://lodufokokafapav.weebly.com/uploads/1/3/5/3/135346761/934c1.pdfIn PDF document text
    • https://xejukogafowoje.weebly.com/uploads/1/3/2/6/132682905/b2e7898111.pdfIn PDF document text
    • https://digufotunu.weebly.com/uploads/1/3/4/2/134266503/d0d49dc1072.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/74d364ddac68cdf.pdfIn PDF document text
    • https://judavolegarar.weebly.com/uploads/1/3/1/8/131871921/2928157.pdfIn PDF document text
    • https://zajutarox.weebly.com/uploads/1/3/0/8/130814803/5167447.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/ijafhiP/63275851979.pdfIn PDF document text
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/kirok.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/uxjfLfn/como_se_dice_fundillo_en_ingles.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/xizogemara_bevabola_ganuradugolej_gumepelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/02188072-014c-4770-8d47-499d40dd28e8/33197364073.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/calories_dunkin_donuts_coffee_with_cream_and_sugar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cdb7ea0-bc57-4091-9f3c-619cfda58428/82245267833.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/74311374532.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/frasario_italiano_inglese.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/john_deere_d130_parts_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 5456 bytes
SHA-256: 14e357c3a1c0663455a10b209560d3973e06127a712517c7474c9c4fc56547f6
font_01_sfnt_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 9972 bytes
SHA-256: b363ff9ded1508c2b5be05f5c53f031bbf966ee3a0c0b8dd1c1576466ecb1b13

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