Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd0e28dffef4324…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 23:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 089999548966c98049bad224d76c6e58 SHA-1: 89d97fd58d549d576d176d028ca7d372d8383172 SHA-256: afd0e28dffef4324a5f7a5e181e06e986c36d6668c5767745ce76a25d884696c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=song+it%27s+a+new+dawn+it%27s+a+new+day+lyrics
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb2f52341f---44554331909.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/llp14boiv3gj1khtc8vv0fjs9t/7021064692.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b196a21c1bede819db61687e7e39ce92/zumijev.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a922d7999---tizezo.pdf
    • http://fecirturizm.com/resimler/files/53643266006.pdf
    • http://shangrilayunnan.com/ckfinder/userfiles/files/wikemipoviv.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/5v5dgvqa7olpd1r44964omf1k5/48795000154.pdf
    • https://mfdesign.hu/files/file/58904651990.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4fbfa28678919d0ec94e82266b2a1fc/pakoxitakikabixek.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/722cf2e4dcd32dcdba3da18e482e315e/66848551638.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7439f65ee016f3c34f98be20de425284/wakogasukekokinimolasu.pdf
    • http://carrasvilla.es/uploads/files/36427762967.pdf
    • https://dienlanhbachkhoa.info/upload/files/54490098990.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55a5eeb9f---binemazulugax.pdf
    • http://naucseto.cz/storage/62127890960.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35d9d918c0---17599089702.pdf
    • https://vivekanandbawwa.com/userfiles/file/veludetebekiga.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d01b5e922---71729183075.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ada2aa9f88f---xokofubonekabogaza.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160967016455d6---74275398906.pdf
    • https://gastriklandsbf.se/UserFiles/files/29194937242.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a978668aee0---jimanosepepubagedovijeno.pdf
    • http://asianmosaicnyc.com/userfiles/file/sisisevewegozoziw.pdf
    • http://amexeuro.com/an3_Uploads/file/sixagosisegitobop.pdf
    • https://menlopark.com/wysiwygfiles/file/77113683758.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c5.bin
d6a5494044eca21a5b3a5335e1554b11a3d8641115e79ce38d3abaa5a562db7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 17052 bytes
font_01_sfnt_off0001161f.bin
48a94faac20a1e4ce63c965f1dc6db231017d1b23c73811b72c073ff1ca34ea6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1161F 10856 bytes
font_02_sfnt_off00012f41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F41 16792 bytes