Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69c0ba7db166f92…

MALICIOUS

PDF

65.4 KB Created: 2020-11-13 14:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 19fcae883924cae475f66ae93c4d0bb1 SHA-1: 37a9008f08c1908fb545e2a131f4a1c01baef62c SHA-256: d69c0ba7db166f92fa7e046ccf02e20162065c540d6d37ee7668c8137adce6a8
184 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier also strongly indicated maliciousness. Although no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=juegos+de+escubidu+y+la+casa+embrujada In PDF document text
    • https://puxugewukuniw.weebly.com/uploads/1/3/4/4/134492634/9aff64d2.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/tiwemo.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/5952294.pdfIn PDF document text
    • https://tizepuwi.weebly.com/uploads/1/3/4/3/134367539/pudedumirapojaja.pdfIn PDF document text
    • https://kerizivol.weebly.com/uploads/1/3/4/6/134665291/fafasatelagup.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/1991623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fa7730ec7323.pdfIn PDF document text
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/wudepinuruduxajaz.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/c3d7a370-b50e-47d9-8264-ea59aa537de6/30411779889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5819ce-8e37-4a20-bc32-f9f1146ba38a/daily_routine_in_spanish_speaking_countries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b64b0a2-4506-4030-8be0-36f9834fcbb0/xilunogikovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d624426-bced-47b6-afb0-0d527173af01/9409442761.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_off0000c287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC287 5564 bytes
SHA-256: 3f7812cc4ac1ad89f2475cbcbb7491f1b84b015a89456a8f8f8dec4fb68809ec
font_01_sfnt_off0000d563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD563 10876 bytes
SHA-256: c9997e3a1e8768cb1ab5aa9aebee5a0ea29a4ef396c2fe8e326fe4a3eb51a7c1

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