Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea18210d0e6280a4…

MALICIOUS

PDF

77.9 KB Created: 2020-12-10 13:16:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3f730163a80329e3c0338df12166e23f SHA-1: 19bd9fd4f1cf2de5a6d054a55f34e8b94bd2de4c SHA-256: ea18210d0e6280a41ae4f6dd265b7a9e9de6599e05608df93aff1eb3b148f8db
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with one pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference game-related terms, likely as a lure. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to a malicious site.

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
  • 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://trafftec.ru/123?utm_term=ffxiv+relic+weapon+guide+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5fc8b1085b8dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5fb5cd38526a5.pdfIn PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/zodetozej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f9af9bee7e59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5fa7e186db67c.pdfIn PDF document text
    • https://kekulewu.weebly.com/uploads/1/3/4/3/134398637/9953224.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/916016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daselex/beautiful_roses_bouquet_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667f45d6-161e-42f8-86e4-caf32ac69296/lugebewimuke.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bf4244e997374a281700/t/5fce1e895d2e6f3bda65182d/1607343754126/84721598970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44511be1-a867-472e-86a7-c7411f5fab0a/administrao_do_capital_de_giro_ale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6249c51c-b594-4656-b84d-42f5936c806e/bevexidijomedadexom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d72b0d716e027b00323d/t/5fcfe658e21d50615a59c563/1607460443891/gokok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a551ceb-f9f9-4415-b1f4-1854d881bf0e/kenmore_ultrasoft_400_water_softener_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe10187-3dc8-46c2-929b-760b495c65a6/suzimapivavaruxukixuvunor.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_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 5320 bytes
SHA-256: 1a8bb39fd5dee46b0bc01204d463d77c26155182ebbdc471e5833ad6a419d93c
font_01_sfnt_off000103e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 11700 bytes
SHA-256: 3d3cd1566d2d6a0e7df5d6248af8c335cd7b07583496615fbecbb57f29c87456

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