Malicious PDF — malware analysis report

Static analysis result for SHA-256 defaefabe337fef2…

MALICIOUS

PDF

109.4 KB Created: 2021-06-08 03:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 217661ae46490b92b3757d70f6908df4 SHA-1: eaee1fcbba12d916755727d259f4f82d8b9b3288 SHA-256: defaefabe337fef233b9e6eb7171ac747a85e243aa2ab3429009846d37868c3c
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm, containing a large number of external URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

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://drafthe.ru/pbw?utm_term=is+scag+patriot+a+good+mower PDF link annotation
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/ecd27.pdfIn PDF document text
    • https://likasitazebiw.weebly.com/uploads/1/3/4/5/134594682/jusekisokumisow_lonumu_gozivemigulim_tirizesagalaweg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465389/normal_6003ed7f2a42d.pdfIn PDF document text
    • https://porexogu.weebly.com/uploads/1/3/0/7/130775034/a4f39324b1.pdfIn PDF document text
    • https://metiganad.weebly.com/uploads/1/3/4/6/134659194/5693386.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/sisivupuv_kapodebonelopi.pdfIn PDF document text
    • https://fevorixuf.weebly.com/uploads/1/3/4/6/134667435/mizajilabirurup_vorenolowid_moremex_texovulezu.pdfIn PDF document text
    • https://gefilatokakanor.weebly.com/uploads/1/3/7/5/137501249/selotorezo-lusadebisor.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/demuwas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc989eeb30e7.pdfIn PDF document text
    • https://pefasuvut.weebly.com/uploads/1/3/4/7/134716349/jupivupijunagaz-kekesa-xetepajebumazog-jetobal.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/f253013.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4480581/normal_60b1d9848b308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448731/normal_5fec34be243b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452157/normal_6054e0085921c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_606b2a93621c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://polubisoxuwo.pbworks.com/w/file/fetch/144770250/57881894721.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/f/stardew_valley_multiplayer_host_commands.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/25444087446.pdfIn PDF document text
    • http://nipekari.pbworks.com/w/file/fetch/144604086/prentice_hall_geometry_chapter_12_answers.pdfIn PDF document text
    • http://namimutigete.pbworks.com/f/how_to_learn_french_books.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/fozifowigenemuwo.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_off00016cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CB9 5388 bytes
SHA-256: 250ff9b0757a0d845b47d2a791734491153d1f874fcab7bbeb7aa14d1696d128
font_01_sfnt_off00017f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F09 11812 bytes
SHA-256: 7406425c46e66c7f6c3db1e0e8553783934e2894630baab4c27383d67adec450