Malicious PDF — malware analysis report

Static analysis result for SHA-256 d799dce06dd20e76…

MALICIOUS

PDF

84.8 KB Created: 2021-06-06 01:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36998f9888bd8136940f6bc4289ffd58 SHA-1: 76646e7c0b7189d9ab11f07f3672967876c3fc5e SHA-256: d799dce06dd20e763b7e61bb98535a7c0818ee1e61812a6597aaa08d12195fce
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crewmak.ru/pbw?utm_term=echelle+dubois+buyse+cp+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386609/normal_5fec91e9eeea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_6021a94ec3e87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5ff384a3dc70b.pdfIn PDF document text
    • https://pezusadoti.weebly.com/uploads/1/3/4/5/134525395/goxop-zapon-widuko-wipolidiwada.pdfIn PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/1860013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_601f9a98098ab.pdfIn PDF document text
    • https://vudunige.weebly.com/uploads/1/3/5/9/135981242/2175228.pdfIn PDF document text
    • https://mojiwisixireze.weebly.com/uploads/1/3/4/6/134615440/e53a11d007473.pdfIn PDF document text
    • https://tofajoxoroj.weebly.com/uploads/1/3/1/6/131636991/dokale_fevum.pdfIn PDF document text
    • https://faxofisokat.weebly.com/uploads/1/3/4/5/134598269/gitinulivalunod_wilafapelidow_ranutavasefos_kapirebeladav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_60305fa059358.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/92d32758-77fb-4f53-a075-14c399494699/kavenepajovak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d656a4-9c14-4600-97ea-2bb63e21885a/what_is_meant_by_airborne.pdfIn PDF document text
    • http://xegosigex.pbworks.com/w/file/fetch/144687078/83633535827.pdfIn PDF document text
    • http://nukuxim.pbworks.com/f/google_play_store_apk_free_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067e935b-d942-430d-872e-6e433fdae001/fosowilexiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e1b9a0-1d62-4d40-8725-43f925bb95ca/beginner_weightlifting_routine_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80dea12c-3e8d-4b3a-b9ce-5098dde50bbf/78930259143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcea994-e3d8-4b83-97ee-df17fa4ae599/data_scientist_salary_austin_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8acb26-2367-4900-9830-47a5d925b6c2/xisifenora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8121bdbc-b18b-4595-9c5e-32305400a5d9/3_ejemplos_de_oraciones_de_lenguaje_denotativo.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/dodixuxisoxugawiwasobogab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7081169-2bea-40ae-8df7-2422a7a5249f/tisarefikisevepaxaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c02511-9445-4e2b-a5ca-3156a07cc1df/gegopabetofiviz.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_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 5136 bytes
SHA-256: eecaea8891ece42154aeb48aaff7dcac46a5aae9f5b87139d908b97f8591c337
font_01_sfnt_off0001214a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214A 10700 bytes
SHA-256: a89230647f429f8aee9b150e8bda74204e49af02cdd54dbf64009520b577eb56