Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a49c85e9b4b1f3…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 18:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 743881e62231995798ba6b209aa98950 SHA-1: ef62692134dcf72680aa0866754e7a973c38d0f6 SHA-256: 95a49c85e9b4b1f3bb37179cc26c2e13efe68ae0587000acebb12b6a8d4c52a1
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The embedded content and heuristics suggest this is a phishing or redirection attempt, likely delivered as an attachment. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support this assessment.

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
  • 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://dafemum.ru/strik?utm_term=suzuki+sidekick+2.3+engine+swap In PDF document text
    • http://mestikon.online/raxufaj48kp0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_6056836c57522.pdfIn PDF document text
    • http://fruit-citrus.space/how_to_pronounce_aum_correctly4hm6e.pdfIn PDF document text
    • http://uaportal.site/jikake4x0sj.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/pride_lift_chair_serial_number_lookugsi8v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5ffb047d26fed.pdfIn PDF document text
    • https://tidumexuxuzi.weebly.com/uploads/1/3/1/0/131071252/17eae5a.pdfIn PDF document text
    • https://sopidafepu.weebly.com/uploads/1/3/4/7/134744384/7980808.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/36892813634.pdfIn PDF document text
    • http://lorenbayi.com/523120170668ywln.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/how_much_is_bobbi_kristina_brown_worth.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/2966971.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/where_to_watch_salems_lot_for_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_5fe9935c5aba8.pdfIn PDF document text
    • https://jomefexud.weebly.com/uploads/1/3/4/7/134732593/jokojulenibip.pdfIn PDF document text
    • https://kikokemez.weebly.com/uploads/1/3/5/3/135331375/tubevopuwobabo_lukuj_ruvopimepu_vanafibupa.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/f357ebe8-5193-4984-a524-74eaa6c5ea19/general_data_protection_regulation_consumer_rights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5234378-00d9-4b7e-8e49-faa98d0d713e/hp_laptop_price_with_i5_processor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1505fe1b-08d9-4129-a941-8f450bb565e8/jenujubutivupotev.pdfIn PDF document text
    • http://solugivewatewa.myartsonline.com/canvas_sebrae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51013827-b297-409c-9566-aedbceb7e29e/is_silica_more_polar_than_acetone.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_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 5440 bytes
SHA-256: b83dc3d707a3f1158c6d6fbd91d2e4f7e89f847a86270dbfc0935afb2d69cb63
font_01_sfnt_off0000f665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 10860 bytes
SHA-256: 58af867e0fd2bc771db33b091352b30369350deca7eb9db5ae5be95ff4fc3bc4
font_02_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378