Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30bf9315c373e58…

MALICIOUS

PDF

72.7 KB Created: 2020-11-19 19:29:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8050cf2af8f50b68ce597a22975e16ab SHA-1: 925c267c04e96927138cf7c28f992a9c337352ef SHA-256: e30bf9315c373e5894193ecdbea85fe5b02c5b50f2151cfde89dba6587243f5d
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 0.9998

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://trafffi.ru/123?utm_term=episode+hack+unlimited+passes+and+gems+apk PDF link annotation
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/jafofabum.pdfIn PDF document text
    • https://kimiragijasem.weebly.com/uploads/1/3/4/0/134096233/3508522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8cc4170bebb.pdfIn PDF document text
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/707c74382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8a7890def5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_5fa83d394fe3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f9b2b1fddb47.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/d0cff41d-c2fc-4b30-abc2-065e37fae4ce/download_provider_sqlncli11.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d48d9ea-4732-412d-81a5-97f7454f36eb/pakeseramez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83929bec-00c4-4160-b91e-f10f7d1817fe/23489699373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2d46d8-1f6a-4c8c-bff0-2fb20555d1a0/binuzogatuzaxisij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba72d781-d6a9-4af6-a289-50e1850b6ae8/bf200_transistor_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ff27aa-0d92-4ac4-afce-22fb796bc053/96292953683.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 5412 bytes
SHA-256: 91c2e0f3ea2e1fa969dc5676779d3a97df6fa65363a854180a742732f53b529c
font_01_sfnt_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 10220 bytes
SHA-256: 56968c06537aafe3d82683793e050f4907588e379b83c274a042135f453e90d3
font_02_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 16272 bytes
SHA-256: 82b32699d950f0d2801881094b97f6a3b10b5d147672c8518649046776eee3b8

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