Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e75b976b8299b4e…

MALICIOUS

PDF

44.7 KB Created: 2020-11-04 07:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ebda152dd950b937c74eab3439b0dac6 SHA-1: e3b00e2dcadd70c313006a129c7e0f813acfc919 SHA-256: 0e75b976b8299b4e0a079484f90be53f54f40a56f9467a40a4e20c2700404038
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to obscure the final malicious destination. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/aws?keyword=roundup+promax+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8e0c50cb0b5.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/xazatox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f9cffa140f33.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/8569290.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/4065645.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/3b9448046da5bb5.pdfIn PDF document text
    • https://kunizemofowirux.weebly.com/uploads/1/3/4/3/134311671/3333346.pdfIn PDF document text
    • https://roxexiku.weebly.com/uploads/1/3/4/4/134445291/miderat.pdfIn PDF document text
    • https://guzifako.weebly.com/uploads/1/3/4/0/134096492/durusudebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7a7166d0-26be-4aa2-87ae-0625865f3493/exergen_temporal_thermometer_battery_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e6b7c5-6fed-45c0-87df-40c3936d6cc3/puzewalejobejunutipij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 4688 bytes
SHA-256: bb94f7f4fb9fea685902c80b4d1b3d06b66ec795f5e5da7915e3677131f71d25
font_01_sfnt_off0000728f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728F 11152 bytes
SHA-256: 20f679a20064927aea7a40dd347d749c2fd4234a4f4cbb1c5d2eb2e0e1bfbf98
font_02_sfnt_off0000986d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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