Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f1c120fc8f3a2a…

MALICIOUS

PDF

69.8 KB Created: 2021-04-12 17:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1b32d562f2b34f8d0f93c1639a341549 SHA-1: 26635507ea57bb0c07aeae0cb250560f99ffa9ba SHA-256: 92f1c120fc8f3a2a4a603819726a8866d13d73263e2971016220ad9fede4a6d6
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, indicating a link farm or phishing lure. 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 embedded URIs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/strik?utm_term=what+are+the+nutritional+requirements+for+elderly PDF link annotation
    • http://gixodugesu.medianewsonline.com/map_of_southern_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/jEGlU2L/graphic_design_apps_for_ipad_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474980/normal_6015112b87abc.pdfIn PDF document text
    • http://fujenotaj.22web.org/english_synonyms_and_antonyms_mcqs_with_answers_nts.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/anycast_m2_plus_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/8mxiggi/gibenukotanidudex.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/bjfihOC/53958531423.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fcd318f7638e.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/chbcmii/62127916763.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/jgcjdhh/28938349961.pdfIn PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/tBcIihL/metal_slug_defense_hack_apk_1._46_0.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/hfhbhdJ/siwifisuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412391/normal_5fd7bbf24d546.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/jfudCii/46905874223.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/ib2NhaN/98666104895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejoxon.rf.gd/how_caffeine_affects_the_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa89c397-33ba-478c-af76-5436d1b30f16/aircraft_maintenance_jobs_las_vegas.pdfIn PDF document text
    • http://jeworobe.rf.gd/birthday_party_flyer_templates_psd.pdfIn PDF document text
    • http://nazowovemozugiv.myartsonline.com/the_natural_book_series.pdfIn PDF document text
    • http://vomogowejupilu.rf.gd/jabra_freeway_software_update.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/98706930207.pdfIn PDF document text
    • http://luvetux.myartsonline.com/kogidetixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52fb7fc-fd25-49ba-8a4b-41f8a58d4a6f/dugebuzevemufoz.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_off0000d41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41C 5388 bytes
SHA-256: c6be1fca5ca06956188c81e5f03bbe22db4eb97513051c0378875aa22c450089
font_01_sfnt_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 10140 bytes
SHA-256: 96479714040f624fc8f058710aca3aa3e4e27baf8653175640f87d22498d8a27

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