Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5335dab07ebde6a…

MALICIOUS

PDF

80.5 KB Created: 2021-03-01 05:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3d9609dabe22dd7e676d3780e18e78c3 SHA-1: 74f214cf7d44cb9a53feb36d158dfda18b472895 SHA-256: d5335dab07ebde6a1d980e52b3af381fff1b47bf8a13f1fd570a9fe4e9306faa
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites. The document body text is heavily obfuscated and unreadable.

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://lozipotod.ru/123?utm_term=how+to+prepare+for+physics+class+12+2021 PDF link annotation
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/b7917ae0d9cc.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/xevubolanume-jaziwirevuvufa-xemijukoduda-kezetize.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/hcTibNd/car_dealership_tycoon_codes_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/gSihcjh/tubovosunaterirovaxidile.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/mexewutik.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/45471334042.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/hfdhjoX/bts_dynamite_video_song_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/hcEtggb/11770593137.pdfIn PDF document text
    • https://vofesoxofibebup.weebly.com/uploads/1/3/4/9/134900141/3e6b0f28f3a7375.pdfIn PDF document text
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/933329.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/zovos.pdfIn PDF document text
    • https://wusuritod.weebly.com/uploads/1/3/0/7/130739885/xemutusexikol.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/gekizin.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/limits_at_infinity_horizontal_asymptotes_radicals.pdfIn PDF document text
    • http://luxavukibana.22web.org/thor_son_of_odin_quote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/haematology_report_mcv.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/cabinet_office_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/wageradavajuwafinaseri.pdfIn PDF document text
    • http://nixewawomito.epizy.com/tlcharger_bescherelle_exercices_et_dictes_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/20689610162.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_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 5584 bytes
SHA-256: ccf34107288f4ec3ac863fa5c41049f3f69e9df509e479b75d19cee2b2390330
font_01_sfnt_off00010ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFE 10704 bytes
SHA-256: d1c3e813749a5986767787eb41a202e22b3da184832af54deb5befda8ce9017a

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