Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20b60a12f9fab67…

MALICIOUS

PDF

81.8 KB Created: 2021-06-27 12:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc2227bc06b9bfa93b49a620805ee220 SHA-1: a0e096944b2860ee84d46b247040a0188185fc39 SHA-256: f20b60a12f9fab67749d3a04e8a0bd9b1f603dc5224fab46f2588b153d09436f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086fda51709e---99921964962.pdf
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/1222830894.pdf
    • https://malashealthcare.com/userfiles/files/79762295322.pdf
    • https://bem-sa.com/img/file/75781554487.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/9ab46da8848088fb5b7a01fc32b2eca8/9833420372.pdf
    • http://wisdomtours.net/upload/file/62328711873.pdf
    • https://aashianarealty.com/file/59138794791.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a060f8499ba---60569594197.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/7i1f0lva3dpgmqomfqc1i58qb8/rezujil.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/4bf5515f75a53560b3bb9a161d9de399/65813371711.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/03d27020c44c30076b5becba34f42635/91489068508.pdf
    • https://yuss.it/file/26464346130.pdf
    • http://www.yoko-ono.be/images/userfiles/file/92929881007.pdf
    • http://pietroquatriniarchitetto.eu/userfiles/files/41433148689.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b71d73ba9fe12817002770ebe2fd79cc/99525897709.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/4684a79a3d483a76ffdc2d659d242709/wivoxikenakoxozogo.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41175cc6a---gizuvojaw.pdf
    • http://jikaramen.com/uploads/files/73297050276.pdf
    • http://akkoryazilim.com/userfiles/file/68226020016.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d228ef3fdd3---nibebegebirepu.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bf02489f72b44d9bc12dbdabae8b5894/miget.pdf
    • http://c2r-auto.com/uploadfiles/file/2021061310472773499.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cf8a090a5---girorebapikidapupanokawup.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c82e002ca---29270387963.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=i+know+we+be+so+complicated+loving+you+sometimes+drive+me+crazy+lyrics
    • 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_off0000d595.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 16792 bytes
font_01_sfnt_off0000edac.bin
16ef1619cd9ed21c9ee8664ddb63b06bc60b26f58021405a58107b8236edea5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 11468 bytes
font_02_sfnt_off00010875.bin
631f89c4cdffb04797da66c687876f4172dd8336a8b936625e41a36553dda286
pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 17872 bytes