Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d10179297f63230…

MALICIOUS

PDF

95.5 KB Created: 2021-06-09 19:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 14e33372da534e4ae76beabc01e00e26 SHA-1: 376932b0235ab70ff88de106f5bc3f52526fa043 SHA-256: 7d10179297f632305f7221e9d9d6cca3769b32a5d93729ff2be9e78c450a148e
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure and embedded links suggest it is designed to trick users into visiting malicious sites by posing as a download for a song.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=aww+tera+happy+birthday+song+mp3+audio+download PDF link annotation
    • https://alamansyria.com/userfiles/file/xumotumatuzuwizefabi.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dda9c1c6c---wiwozosulowivefu.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a015d4612c9b27670a7465fe20b82b96/tedagebadejuratiwaden.pdfIn PDF document text
    • http://614move.com/clients/4890/File/lepubinadamopimefori.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/tts419fq6smu3nubp40e81huo6/xonelunizuvetob.pdfIn PDF document text
    • https://digireg.dk/upload/lebaribonivel.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0c90aee1c7c54be6e020a4e856570dd9/favagubutubuj.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/zagalumigu.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/zukitobaxo.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5acec6ff1---vojubexubegamuf.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/lozekiwatigejimunige.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/138930c96ed002b5cd998f889632d7c0/7763638318.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089c93c5e053---12453085606.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814b760f6c9---rogarojojirelagar.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/wopas.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab594476737---kedefagimuwavorumabititot.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/mudisanobifudejev.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ed7b39a3---gofat.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
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 5744 bytes
SHA-256: eb1dc4184cebea7e1bda2e81ed52cf5f780977ab4cc86e2536b79fe0fed09f65
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 11616 bytes
SHA-256: e544658197cabc28f1f609ba96b04cc7e2fa7862eeea670b1ef78232c8473bcb
font_02_sfnt_off00012182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12182 11732 bytes
SHA-256: 72a481279a004734712ec0656b12971d30ed3b92945bdcf90e6931f5c15fcfc7
font_03_sfnt_off0001497c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497C 17000 bytes
SHA-256: 98dbc28ff0e68d4795e7a26f48ebd5ba3b182f4fb4e59a38a9109594595126da
font_04_sfnt_off00016119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16119 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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