Malicious PDF — malware analysis report

Static analysis result for SHA-256 517f34311c6aad76…

MALICIOUS

PDF

73.3 KB Created: 2021-02-04 07:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6652f705b782a05ee1ceef23ca1b5de8 SHA-1: c85ade97d73b0b88dc40acc0321eeb20536a0cb5 SHA-256: 517f34311c6aad76901729d97c3e5d5b38ed7ac156e26872d8cde44ea8247efa
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and Weebly hosting, indicative of a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/aws?utm_term=arx+fatalis+manual PDF link annotation
    • https://xufiridib.weebly.com/uploads/1/3/5/3/135346556/5904214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_6017a65154f49.pdfIn PDF document text
    • http://reduslim-official.website/72131652390ktxzb.pdfIn PDF document text
    • https://gasovopur.weebly.com/uploads/1/3/1/4/131453365/a6702cd.pdfIn PDF document text
    • http://delifeschool.com/jewajuvokuj4lpt6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5fd7abdce898a.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/degelav.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/b658ede6.pdfIn PDF document text
    • https://dovavifedudefew.weebly.com/uploads/1/3/2/7/132710721/duxovoluw.pdfIn PDF document text
    • https://kujafuzepod.weebly.com/uploads/1/3/1/6/131637430/xapat.pdfIn PDF document text
    • https://rinapaluvubozi.weebly.com/uploads/1/3/4/6/134669605/puritovotudire-figodoxikekaku-widujozevagesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416493/normal_600263217e231.pdfIn PDF document text
    • https://vujalonekodi.weebly.com/uploads/1/3/2/7/132712286/0d87251e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476758/normal_6002b26845485.pdfIn PDF document text
    • http://onenature.space/old_time_road_sheet_musicrs66i.pdfIn PDF document text
    • http://sunny-web.ru/862712697536kg0y.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/93c4cf454b55.pdfIn PDF document text
    • http://baranaydin.org/avatar_258_auto_farm_apk5kqlh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489583/normal_600e022c8c204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesexabipezu.epizy.com/sejatuxeporovevojufoso.pdfIn PDF document text
    • http://tudemofexurujen.epizy.com/82680274779.pdfIn PDF document text
    • http://witeguxatuzidaj.epizy.com/new_sankarabharanam_audio_songs.pdfIn PDF document text
    • http://gofirog.epizy.com/attivare_android_auto_fiat_tipo_2017.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_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 4968 bytes
SHA-256: 7ec0233a09272157fee6192e5c081f8c6fc36c1caf9e52ebfcc4e7736fd2904b
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 11064 bytes
SHA-256: 83ed28c605ef162b9cad8c592ca8a620c49056ad71dea7011d28edaf58281edd