Malicious PDF — malware analysis report

Static analysis result for SHA-256 697fb4d28d97df1a…

MALICIOUS

PDF

83.2 KB Created: 2021-03-18 02:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 31db50d60b67e7057d9eff096f4f25c5 SHA-1: d0a878700825cca546230c45f7831f7abc5a76a7 SHA-256: 697fb4d28d97df1ac7406d548250aa50da28c2e9e717003efa2cc58e643b0b82
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=texas+rangers+suite+catering PDF link annotation
    • https://cdn.sqhk.co/tategupet/eibJjir/american_football_champions_2019.pdfIn PDF document text
    • http://zudepogumo.medianewsonline.com/article_in_english.pdfIn PDF document text
    • http://lewuvumo.sportsontheweb.net/66646843621.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/29901816933.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/WihyA3e/fishing_clash_cheat_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/fjcLddU/remote_telehealth_rn_jobs_california.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/ihxN1ic/kizajelalugitupuvoxu.pdfIn PDF document text
    • http://zavulibalox.mypressonline.com/vofavezodurule.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/mapoketimop.pdfIn PDF document text
    • http://pamuxixa.iblogger.org/burmese_english_picture_dictionary.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/zesixefe/altaf_raja_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/bekotafejuxomav.pdfIn PDF document text
    • http://kopevevax.rf.gd/after_effects_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/afc_fylde_stadium_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/resumen_de_los_20_poemas_de_amor_y_una_cancion_desesperada.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/what_is_the_best_food_saver_vacuum_sealer_to_buy.pdfIn PDF document text
    • http://xafibejijopo.atwebpages.com/caf_champions_league_fixtures.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/what_is_60_000_in_standard_form.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_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 4952 bytes
SHA-256: cdcf75b8fbda343e3d7f931c4d40cb3244dca3ca98b876f6e94c6bc2e3befc65
font_01_sfnt_off00011bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF1 10864 bytes
SHA-256: cc5230efba86647dceebb9e60ff01f892e82d0d92946d56815685b3183ecd0b5

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