Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ff6922319bb855…

MALICIOUS

PDF

58.3 KB Created: 2020-12-01 12:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46841a24ad07ba1f137f8a2553176c4b SHA-1: dd2b82bd3aad50089dd2a9657f6a07d2df6fddb2 SHA-256: 03ff6922319bb8550ba390ae3b91c2b1514e85a2a7e78e6b42f1d2c463733a7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=rock+%2526+rule+dvd PDF link annotation
    • https://rokumewa.weebly.com/uploads/1/3/4/5/134529377/9da8ffee850f3.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/mafejo-budavisosur-loladakikurot-lewifidomi.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/2488720.pdfIn PDF document text
    • https://zipexozinapewew.weebly.com/uploads/1/3/4/3/134339437/1716513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f96f16848c71.pdfIn PDF document text
    • https://rijejoxutozi.weebly.com/uploads/1/3/4/5/134599637/varuxogapelibi.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/kowik_japipoxowifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fa3ef7229f75.pdfIn PDF document text
    • https://ladasewesadil.weebly.com/uploads/1/3/4/6/134665294/4128639.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/ruwafanijeluz_sosogewosu_lamunavujitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e006a879396864083677/t/5fc1f7bfa97599144e3d3477/1606547391918/honeywell_quietset_tower_fan_hyf260_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b7932e34347c70431387/t/5fc174699b1ed03538130258/1606513780784/dasaloweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc71d6ad-d91a-4151-b93e-11c8d4ec3366/4228191223.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_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 4340 bytes
SHA-256: 2d18eb9d2eb5797eb18f8813f632648098a89dd0a392f986b3e39ad888c45840
font_01_sfnt_off0000bc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5A 9696 bytes
SHA-256: 44cddc6bb2e51ccfb587bffbedbc9da6112bb0e167e865b03a7908e58583cba9

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