Malicious PDF — malware analysis report

Static analysis result for SHA-256 59801cb782f84e0a…

MALICIOUS

PDF

48.5 KB Created: 2020-11-03 23:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e0897cb32e1229f2f279ee7348be892 SHA-1: b6a2757a99932c67d13b0c16a24de86400f89309 SHA-256: 59801cb782f84e0af7ae29366a047cbf5a9ac5753951d05aad3731fee5f38db9
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.club/123?keyword=mail+templates+in+google In PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/fuzux_zinubowawifo_dajopasi.pdfIn PDF document text
    • https://bemuzulezevateb.weebly.com/uploads/1/3/4/4/134440878/rinalonifa.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/986818.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/4497185.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/8373408.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/titikopevaze_kukusatudojiso_gopexovow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f9587cd320c8.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/1a32d585-e520-4bcf-ad81-0cdc61f4e886/39654115195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c56bbe-0764-4a48-97b4-865bfaf8dc66/mercury_200_20_hp_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96ba935-9eb7-4048-b0f9-531ab80cc272/fakepebipab.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jefofavelagulosa.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/43271796265.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00006fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBC 5048 bytes
SHA-256: 9dd1b3a09b749bfb496ee996339a35a1d6f1f3bd4e738e869e8acbc84ffe3af3
font_02_sfnt_off000080e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E1 2712 bytes
SHA-256: 448ea9e32c555106c372052c925bb2d620c618e86a56be11914f20ebcce94223
font_03_sfnt_off00008c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C73 12444 bytes
SHA-256: b2c97e6dec2b387796634a2ac259c48aa96f1940bc971f2797df5606ca9a6c29

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