Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a9f58b1ed84698…

MALICIOUS

PDF

81.3 KB Created: 2020-11-09 23:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1c6642bc6bbc3345de37c5e407503394 SHA-1: 4aef285be19a799b84c2e2bac52ea1e0dc41a8f1 SHA-256: 08a9f58b1ed84698fb22a350f1cbafd7f39a192029c95f93329548fc38024764
186 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, suggesting a link farm or SEO manipulation tactic, with one primary URL pointing to a search query. The document body, though heavily obfuscated, appears to be a lure related to an FFXIV guide. No scripts were extracted, but the presence of multiple external links suggests a potential for downloading further payloads or redirecting to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?keyword=ffxiv+castrum+abania+tank+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419645/normal_5f9a06b0d19ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5fa85f4e970ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5fa03efd80020.pdfIn PDF document text
    • https://tubumafipe.weebly.com/uploads/1/3/4/4/134458357/mewiwono-xabonogiv-mewomus-libadojimubomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fa24232f2a3a.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/a40aed3.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/9526121.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/denosu.pdfIn PDF document text
    • https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/c76bb9674ffd81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_5fa7d94418ed1.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/piwanisaj/15861013703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515aebd9-7f68-4223-ba2e-d04354ada972/zelusibujuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5b3f97-2dcb-4323-8149-6bbe3fa78949/mitorug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8943eecc-b768-490c-be62-8dbfca1ab45f/38167272017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbe5a0a-9c0e-466b-a218-07e244786367/makewulap.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/mario_combat_unblocked_720_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6085ba64-ea3c-4f55-aad5-8b6392ef08f5/xejozutif.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_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 5596 bytes
SHA-256: 51a81ff9b9306f0c6ce0ecf37b6ff06fb49f41ecef1ae5db5607bdfa023f5525
font_01_sfnt_off00011373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11373 11516 bytes
SHA-256: 4c44bcd87b860e81632973cd24683bfc57715d14c686ab5fef072959e3c86ecb

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