Malicious PDF — malware analysis report

Static analysis result for SHA-256 3455d5c992bce203…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 18:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1d7225cf4657137f3b7e2a8d25239f43 SHA-1: 417a55b47a843a018257246f2818cf7817167e6f SHA-256: 3455d5c992bce2033237f11c682717fd9d893a9974b6120301ae7e81328c42b7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=how+to+read+a+metric+micrometer+worksheet PDF link annotation
    • http://fajufoturesu.sportsontheweb.net/lejotajojunaxalusofexidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_604e1b444a7cd.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/hamilton_beach_coffee_maker_4790096104.pdfIn PDF document text
    • https://kagunalikabogow.weebly.com/uploads/1/3/5/3/135350350/600cc2971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_6002d33f239d6.pdfIn PDF document text
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/cb331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_6032f09349d17.pdfIn PDF document text
    • https://zobimodajozo.weebly.com/uploads/1/3/4/3/134340865/53c9a0ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6044007e29633.pdfIn PDF document text
    • http://jakartapro.xyz/amiga_game_romsxh99z.pdfIn PDF document text
    • https://sawifumoz.weebly.com/uploads/1/3/1/3/131380604/wamexulej.pdfIn PDF document text
    • http://znalomstvavip.site/how_to_put_together_a_graco_pack_n_play_anywhere_dreamer867qq.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/g7gih5e/automatic_photo_background_remover_free_download.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/what_is_the_best_knife_to_carry_for_self_defense.pdfIn PDF document text
    • https://xajogizikotepi.weebly.com/uploads/1/3/1/4/131437636/pupuranijata.pdfIn PDF document text
    • https://cdn.sqhk.co/jarutejip/phh2Wgc/my_android_phone_won_t_turn_on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_60508b0792b02.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/En9dibX/best_board_games_for_adults_strategy.pdfIn PDF document text
    • http://lifegirls.site/biointeractive_photosynthesis_student_worksheet_answershl3vv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xonelamurojili.rf.gd/44679039420.pdfIn PDF document text
    • http://legibevisavu.epizy.com/zoforuvasotev.pdfIn PDF document text
    • http://rexawego.epizy.com/6874232456.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_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 5264 bytes
SHA-256: 9952c69cfa67384ff7aa3802c6f9a4680ae21ad8c08d1207ee9a236960daab14
font_01_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 11284 bytes
SHA-256: 2a96f5fcfd4d546dfaa68b8007285cfc4a78a54d35a1c2bf262314c7a7505dff

Open this report in the interactive analyzer, or submit your own file for analysis.