Malicious PDF — malware analysis report

Static analysis result for SHA-256 40be08a5f13fc43a…

MALICIOUS

PDF

75.3 KB Created: 2021-03-28 05:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaa582e9dfb1aa4b5e089a69da773108 SHA-1: df6e161c37c9049996c80ae0f5c70483ec63d7ac SHA-256: 40be08a5f13fc43a962122fb95baa4cb0d9db774807a11669ff785941dd6e56f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to manipulate search engine results or direct users to malicious content. The presence of a URL pointing to 'gta v apk 2020' suggests a lure for potentially unwanted or malicious software downloads. ClamAV and ML classifiers also flagged this PDF as malicious, specifically indicating phishing and trojan characteristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=gta+v+apk+2020
    • https://static.s123-cdn-static.com/uploads/4392860/normal_5fcdd1eddd90e.pdf
    • http://lizakoku.22web.org/analyze_this_chess_for_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4461481/normal_5fc811d6b4ee3.pdf
    • https://static.s123-cdn-static.com/uploads/4418175/normal_6005eb856ddce.pdf
    • https://static.s123-cdn-static.com/uploads/4494893/normal_5fc7d0a07777e.pdf
    • https://cdn-cms.f-static.net/uploads/4369901/normal_600d97e49f565.pdf
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fd844376d5bf.pdf
    • https://static.s123-cdn-static.com/uploads/4376362/normal_5fddad30e36ca.pdf
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5fc7a758022e1.pdf
    • https://cdn-cms.f-static.net/uploads/4426828/normal_601b68aed4689.pdf
    • http://bezigex.iblogger.org/amsonia_planting_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zukusuvajijip.epizy.com/22770347183.pdf
    • http://mosupixozijet.epizy.com/dstv_explora_installation_guide.pdf
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_a98be7583e2b464cb04f8ab2e001334c.pdf?index=true
    • http://zobawukesilebaf.epizy.com/94527480729.pdf
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_68f1c9ccfd4843baa4ef8a5d2f887e1e.pdf?index=true
    • http://gagavig.rf.gd/rovukuzabujek.pdf
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_c0f71d76b7e54814a20d7a54d1bd7d48.pdf?index=true
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_0dfd503f5b1d4912a4e7bec7800b51d9.pdf?index=true
    • http://buwufofu.epizy.com/70164686915.pdf
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_efaac17e5711454299cc167b228ebdb2.pdf?index=true
    • http://faluzarawajuxos.epizy.com/how_to_make_red_lobster_chocolate_wave.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb94.bin
8f78becce2b80f26f573feadf9f8c20ad3d11409af6c0737205c00b671f56ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 4936 bytes
font_01_sfnt_off0000fc86.bin
023d6a451487a3a13741c0524a7bfda6bf50bd31931a2dc253e77261e23b2b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC86 10332 bytes

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