Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc365504c17afe0b…

MALICIOUS

PDF

76.9 KB Created: 2020-11-09 19:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f12783e720643bba277eb52e11ce2367 SHA-1: d3ad271fc19a750a3c0fc37dd7ea911548b800ea SHA-256: bc365504c17afe0b9d44c4094affd5476e16747031d2b8aee2b9ad1a9f3f7678
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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/aws?keyword=seems+legit+meaning+in+urdu PDF link annotation
    • https://japosazononugad.weebly.com/uploads/1/3/4/5/134583509/8086f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f88b3b171831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_5fa8d24ac9918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_5fa8256f11533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f88ef11da602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8b4b2885e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f93463a78e7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f8ad1d157a66.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/d2df86a20c70b57.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/nagovemevi.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/d01723e0-0eb9-48d0-9d5a-c0bc8d3b70ba/taribavivifes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192e6629-8134-491b-833c-3bc88a8846bd/takeuchi_tl130_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bfc34d-0030-4342-b22b-082bbb77fbdd/subigegiruput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c06c058-93f6-4197-a63a-aafd691c8ad6/58789795940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33bcc16-58d2-40fb-9e26-10626a0b1972/81461034620.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93F 3120 bytes
SHA-256: 1ad02b79c7091a558633aca35b79c18c4801c8f97407e2d39b41a6bac3159f63
font_01_sfnt_off0000d472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD472 5248 bytes
SHA-256: 472e31095251c01eaa7d032558fd207c237d9e670a4d94b21d92063ae9240f3a
font_02_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 10984 bytes
SHA-256: 855d1a5b7eada975d850dda9bb8161052e0df3f7837c0a205805f7fbd0d7bcfd
font_03_sfnt_off00010bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 17608 bytes
SHA-256: 5185fe1150a049c19bb0587eb6bdb8f24de215bee4f93d905e6464190be461e3

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