Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab19cfca17eca7c1…

MALICIOUS

PDF

76.1 KB Created: 2021-03-29 22:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3b2e3a41ead3f48e7eaeed66f6a24c87 SHA-1: 205216ec3c4c0aa55d6dd7a3db8b560aa835ee95 SHA-256: ab19cfca17eca7c19571ab61f0c1c3cf9f16076c12dc11c74a9045dee3150437
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=at+the+cadian+ball+feminism PDF link annotation
    • http://suberubepuparo.getenjoyment.net/pumaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428069/normal_5fcd2f32008a7.pdfIn PDF document text
    • http://parralax.net/mesin3lnpt.pdfIn PDF document text
    • http://sellamorem.com/how_to_turn_off_sony_bravia_tv_demo_modepylz6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ffba62bcf9f6.pdfIn PDF document text
    • http://nesegejisivinu.medianewsonline.com/59276551018.pdfIn PDF document text
    • http://bu-markett.com/breeding_show_guppiesv0hur.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/1028692470.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/89146084279.pdfIn PDF document text
    • http://gladkoe-telo.xyz/millers_tale_summary8tp0f.pdfIn PDF document text
    • http://reduslim-italy.site/82757277966c68yc.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/db0cc009-0021-45dd-b2bb-619f61d7aab8/gizajelefozisirolafaxof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18f0bcd-5805-4607-a211-5fddbb0086eb/barska_safe_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c30d26e-66a3-41d4-9872-8527917d4f46/vumonipon.pdfIn PDF document text
    • http://jekurur.atwebpages.com/21445533637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f873158-3e25-494d-863d-0ada3857afe2/nidagunoberevake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f344cfdc-732b-4dd2-aa38-1ee1ef0c93d1/28742816050.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/7647972018.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/81939078335.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/lazudewubamo.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_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 4972 bytes
SHA-256: a7602a5abaecd43c455329ff164d675fff683e278c8ad6c8931f70554fd74f2b
font_01_sfnt_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 10684 bytes
SHA-256: 995dd3421237576a582c2f1cf1821117631e9329bd86b3da3f3dc8ee5985ebc8
font_02_sfnt_off00011527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11527 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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