Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e963c98e2cfc90a…

MALICIOUS

PDF

81.9 KB Created: 2021-05-02 01:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a6f6e83693700b6f60fe622d8228ae25 SHA-1: bc73bd0f0576c47c85aa70e054892eb88beffab7 SHA-256: 6e963c98e2cfc90aac3b654d30347c926adefa4e826b8771a22573ad5e432ece
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded links suggests an attempt to lure the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=watchmen+graphic+novel+storyline In PDF document text
    • https://bevowodawalejap.weebly.com/uploads/1/3/4/3/134363876/2689188.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/dFhfphg/lenagubovilaxiligox.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/veruzizabuxaxubojub.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/business_model_generation_a_handbook_for_visionaries.pdfIn PDF document text
    • https://fipuzogafugigen.weebly.com/uploads/1/3/4/1/134108551/034dbd02710ed.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/marriage_and_sexuality_in_islam_ghazali.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/wekorem-nadituvuvepadi-narezer.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/gg3JjbB/mod_ben_addon_for_mcpe_download.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/1577075.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/ggggcgh/60824421556.pdfIn PDF document text
    • https://salogisamokowo.weebly.com/uploads/1/3/4/6/134649366/sugumuxer-gogez-sanonipamosiz.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/algg1je/free_music_apps_for_iphone_11.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/antenna_types.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/vajokilewug.pdfIn PDF document text
    • https://cdn.sqhk.co/bomunerafoju/a8vIhhL/90058692453.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
    • https://uploads.strikinglycdn.com/files/a081cd1d-d8ec-4611-91fa-3f2b3dc9aaba/zafixox.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/ritoladuwakopanu.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/bukanitetixolekudidoka.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/tukako.pdfIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/dilimovibep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42954f97-11e3-4084-bf17-fe92d31fb19e/learn_how_to_increase_your_chances_of_winning_the_lottery_richard_lustig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32defbc5-97c2-4d58-b8bc-26fe91e165c9/2013_jeep_grand_cherokee_laredo_4x4_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f41f9d-3e32-43f2-af0b-e87c0e6d5fcb/87746555034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6acc83a5-4022-41b4-8045-61033f951740/oldest_picture_of_a_king_salmon.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_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 5308 bytes
SHA-256: a6357185b31c08ff03f44e9b1a9c9d0de3ebb2dc2ceb144290b1c1b3f72b1920
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 10776 bytes
SHA-256: 84bd7ceed7b8846fc90785ffb3edc667aacd15d8d12f2a8d6dd4b09606b7c1d0
font_02_sfnt_off00012be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3