Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3238dd250c6951a…

MALICIOUS

PDF

79.7 KB Created: 2021-02-17 12:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3b28925ed71c946fb91c716004198d5c SHA-1: 63478a50ed8718f0fce506aa5adc09c364edcb8c SHA-256: c3238dd250c6951ae898a3ccb2a8bdf2340326611a5ebb26bb6b84639dec77e4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to trick users into visiting harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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/123?utm_term=husqvarna+20+inch+455+rancher+gas+chainsaw+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454290/normal_6014a5aae2abe.pdfIn PDF document text
    • http://natur-bio.space/34554512277hbkoa.pdfIn PDF document text
    • http://uchebnoe.website/bmw_navigation_maps_download19hf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446161/normal_5fe00d16ea1e9.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/tozokatoburadavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fcab418d828b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376099/normal_5fd06cbe0338b.pdfIn PDF document text
    • http://about-central.com/compound_subject_and_compound_verb_worksheetsjffm6.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/9018b.pdfIn PDF document text
    • http://dronextactical.xyz/publix_wedding_cakes_reviewsk93fy.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/136ca55978d66da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ruxusanufip.rf.gd/free_cash_flow_example.pdfIn PDF document text
    • http://kirogebi.epizy.com/manipabalogekodivadizilaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/karyotype_definition.pdfIn PDF document text
    • http://vaxuraribo.rf.gd/fitted_sheet_for_queen_size_air_mattress.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/zenatuloviwujozubo.pdfIn PDF document text
    • http://womepulus.epizy.com/baghban_movie_song_likewap.pdfIn PDF document text
    • http://jopanitovoxa.epizy.com/bevosibuzejij.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/34737379655.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/banished_free_mega.pdfIn PDF document text
    • http://wozurowimure.epizy.com/lagu_dengan_caraku_bianca_jodie.pdfIn PDF document text
    • http://pitugozuput.epizy.com/cacti-_0._8._8a._exe_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 5580 bytes
SHA-256: 8e28529e7269641352f5a3306684e8d77ae9ca50715c33a249f287847317de18
font_01_sfnt_off0000fc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 11252 bytes
SHA-256: 071c861949bbd7fdb14eb636a8ea8420cc6e28018a0b8233a2d6b78f07415e38
font_02_sfnt_off00012257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12257 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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