Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e781976aee628f…

MALICIOUS

PDF

73.6 KB Created: 2021-02-27 01:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4e6958aa7cb480060ee8a294120a559a SHA-1: 213867633aafe65ee99e3287a9fc89ef1339c278 SHA-256: f2e781976aee628f8747675c2548b4d4644fa2ae7f2d29f8bdf42d979e689f83
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 PDF_SEO_LINK_FARM rule indicating a link farm on disposable hosting. The ML classifier also assigned a high probability of maliciousness. The document contains numerous external links, likely intended to redirect users to malicious sites for phishing or malware distribution, disguised as search results for a product. No scripts were extracted from this sample.

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://jumiwimov.ru/strik?utm_term=delonghi+ceramic+tower+heater+aldi PDF link annotation
    • http://morasufas.iblogger.org/rarevifofodabojowiwiva.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/safety_first_temporal_thermometer_reviews.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/8180796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5ff407c1278d9.pdfIn PDF document text
    • https://kepubewi.weebly.com/uploads/1/3/6/0/136095452/3b1d5b29.pdfIn PDF document text
    • https://limopepubev.weebly.com/uploads/1/3/4/6/134627214/tidapuwidoketutuwu.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/rorubilidobim.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/222700.pdfIn PDF document text
    • https://wemovimezatura.weebly.com/uploads/1/3/4/6/134611727/7338912.pdfIn PDF document text
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/24eb456a8e2079e.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/e7cd966f47479be.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/782678.pdfIn PDF document text
    • https://gososeru.weebly.com/uploads/1/3/4/5/134597059/gilovezaza-fidupev-guwuliz-dononuzorudorif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_5ff41ab562689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wufalejopasedor.epizy.com/4570378381.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/bacteria_and_virus_worksheet_answers.pdfIn PDF document text
    • http://xolemobubusosi.rf.gd/wekegigitul.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/68678861280.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_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 5264 bytes
SHA-256: 48150f509682ebe3d665e36a1b43cebcce6ecdf216d6c72de9ac967af40aa1af
font_01_sfnt_off0000f3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 10884 bytes
SHA-256: b1bb9877bd3d1303d4fb0cdd957642808c5a3bea92f3c9569b306c5e6c6a4bf6

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