Malicious PDF — malware analysis report

Static analysis result for SHA-256 460cdf32623a8e9c…

MALICIOUS

PDF

76.2 KB Created: 2021-08-03 02:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b549b8b0cda95d0a810fbf102b93304e SHA-1: bbed1e386841bc0041b14e77dd62c471420b5b86 SHA-256: 460cdf32623a8e9ca6c64d11ec55007de5ffedb07445624338e1a2616ab3688e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://menu2uplus.com/images/file/42359701164.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ef51d6f04ec6f03f8b6d9158f3fb73a3/votonufi.pdf
    • http://arch-teh.com/pic/userfile/bazalifazeruxig.pdf
    • http://efuturesthai.com/uploads/files/bapejazititokufigi.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/551250013ba1c2b8d46432d91faefb08/46278519848.pdf
    • https://a2designbg.com/userfiles/file/18747027688.pdf
    • http://lexen.ca/userfiles/files/gijaridagejatewubedid.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/hsimmdcjuk5rjqrm58al2pdd5l/41126475692.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607efffdbef43---85242675086.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081396b4f743---xojapidesela.pdf
    • http://balcimimarlik.com/resimler/files/27787771119.pdf
    • http://atek-ent.com/upload/file/sirodinewo.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a8614f10474---5279539118.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5053969e6---ninuvomaxijama.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/180c55874e5d9d57c7260e581d5b3ac3/fidikofumusotatij.pdf
    • http://gillyard-johnson-mahoney.com/clients/62114/File/numirazolu.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60959b493e---14093978380.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/602ec9256b8cc6f5cda61412547bcf02/10146294444.pdf
    • http://abaj.cz/UserFiles/File/66303258297.pdf
    • https://elesud.it/img_pagine/file/82378092304.pdf
    • http://learnazia.com/fck/imagesfile/pafubazuzijuluguf.pdf
    • http://alexhofford.com/temp/files/file/92073818864.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cd875522c---14365326545.pdf
    • http://ceomit.com/fckupload/file/pafesev.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0b8ec6b15---8729396426.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac872d3463e---sidufiminabuxizunusemamow.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=solucionario+matematicas+2+bachillerato+savia+sm
    • 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_off0000c291.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC291 16792 bytes
font_01_sfnt_off0000daa3.bin
74bad621ff181a58ee4e7e39d46c3b874de393bdddf0c1383b08c8a4a8fc116e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 17588 bytes
font_02_sfnt_off000107cb.bin
239530f092f585f5740d3908d9f0d45cfd53d168052efa91a1622f4848ce8dc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 10996 bytes