Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af7c3ea1c867b48…

MALICIOUS

PDF

87.0 KB Created: 2021-04-06 20:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 79139316e65f513619057379ecae1e83 SHA-1: 055cd18747206e304b1e202c66d248bd0baadbb4 SHA-256: 2af7c3ea1c867b482f4709dd157f382d921cd3711f0ce09d25ee94957e663cf9
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a link farm and redirects to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to exploit users by directing them to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/award?keyword=spectrum+contract+buyout+form+pdf In PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/muroni_vakiz.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/6041018.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/gamewolejekavo.pdfIn PDF document text
    • http://walletelectrum.buzz/20481320951vz8ml.pdfIn PDF document text
    • http://shoop-fe.ru/56131033423m24vh.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/f0b5d781006.pdfIn PDF document text
    • http://baffer-shop.space/ged_extended_response_essay_samplevabr7.pdfIn PDF document text
    • http://trylait.club/metformin_er_500_mg_diarrhea0e17c.pdfIn PDF document text
    • https://neranoliva.weebly.com/uploads/1/3/4/2/134266014/4893794.pdfIn PDF document text
    • http://razvivatel.blog/besamyt8fi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/033ed0f3-78b6-488b-9631-fd2cde33ebc6/how_to_reset_sunbeam_heating_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1de8926-484a-4786-9610-9f609b1fa572/92945646689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e793f6-3e6d-40dc-984e-bf99d37ebd13/zivixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c95e7be-6558-4920-9545-d47c322d658c/gerente_de_alimentos_y_bebidas_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc38c28-e3b4-4877-aaba-5f665324c43b/ge_healthcare_milwaukee_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/xojogisil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca374235-b1b0-42c3-887f-e7be6dd6e760/ruger_lcp_2_leather_pocket_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fff53b-c252-4d4e-b47e-c6f5ab566110/rolelojowotefawemewupaf.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/dogafevuxor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da04fff-c250-4e9d-92ce-849ef0e30ed9/zekonijagegisosizitazuriz.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/depleted_kyparium_rocket_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/interview_writing_format_ssc.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/pamiribugax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f94697-acb7-4175-8c96-4d7b4d216469/how_to_set_honeywell_thermostat_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8645a322-56ee-49a3-850f-ac7c1b9fd616/cyberpunk_2077_johnny_silverhand_gun_and_car.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 5436 bytes
SHA-256: 7b10f26c358fa4bba1df1ecc307833051ac863011a2bc8651964a5b881424223
font_01_sfnt_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 12080 bytes
SHA-256: a0361c37aaf500e1e4bf8a34a41300ed1965d8362b1d78e8afd68a307b4e04f4
font_02_sfnt_off0001372f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372F 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073