Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f278b679c832315…

MALICIOUS

PDF

73.3 KB Created: 2021-06-07 16:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 12dd61a5dfc80ec3d723a199d1c7a1f0 SHA-1: c8ee1b5e6b12cfa2e93f226c581b940231a1a31f SHA-256: 9f278b679c832315ccf8edfcad3701cb61c6406dbf7f33b0d6cf14f21125b6dc
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and ClamAV, indicating it is likely a phishing or malware distribution attempt. The document functions as a link farm, directing users to external sites, one of which is associated with software cracks. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, potentially exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://catamma.ru/pbw?utm_term=adobe+flash+professional+cc+2015+crack+only PDF link annotation
    • https://jamitugila.weebly.com/uploads/1/3/4/0/134012499/wogeroxef.pdfIn PDF document text
    • https://foxewazijibaj.weebly.com/uploads/1/3/1/3/131379544/zedurijem-lakox-sigokelitabeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_604a5865ecbbd.pdfIn PDF document text
    • https://bazulezegit.weebly.com/uploads/1/3/4/3/134372971/munar.pdfIn PDF document text
    • https://vojawafi.weebly.com/uploads/1/3/1/6/131636668/1b3da0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fee42a186937.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/relijomezi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fcd963aafd1b.pdfIn PDF document text
    • https://warajepij.weebly.com/uploads/1/3/4/6/134608856/299ebeda52.pdfIn PDF document text
    • https://mawubikafef.weebly.com/uploads/1/3/4/8/134871360/jivirovag.pdfIn PDF document text
    • https://demifezi.weebly.com/uploads/1/3/1/3/131379940/2872539.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/7f2db5d1-f7f0-41d4-9384-b26b00a37e82/41326816555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69611c46-468d-49ef-af9b-97de3fc639ea/sivijasozitijus.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/superheroes_mod_1.8_9_minecraft.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/w/file/fetch/144514539/problemas_de_proporcionalidad_directa_y_porcentajes_1o_eso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6207f84-9de0-4b74-9c5a-9619702798ea/judith_butler_gender_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffd42a9-281e-47f5-95ca-8c07f5e9bf76/9106628624.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144763977/patudilala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c947df-9f9c-4cb4-b833-9afcdd3564bf/lawn_boy_push_mower_blade_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7490af01-7b31-4e66-ac98-c551f0dbc833/what_did_marx_think_about_capitalism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f86af8c-6221-4a08-adc5-a497bdd07784/difizikodabumogodunusano.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_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 5988 bytes
SHA-256: 1f8da36fe4e6bf4a23206ff6d7bdfd62f9874610b4b2c813d6c9037a39d6e2fb
font_01_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 10536 bytes
SHA-256: af564dffee78ca2247782f6df323a4cf767bfd7f0ebf854fa35c5f3aee9df9a3