Malicious PDF — malware analysis report

Static analysis result for SHA-256 4beeac48c48218d0…

MALICIOUS

PDF

82.9 KB Created: 2021-07-02 06:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d09230da81470ef0b880212067dd467c SHA-1: 118d22598627cddce6494e4e1836bc3c8b25f2e4 SHA-256: 4beeac48c48218d0af6a459da14e6ad986306cc711e5b377ae18ef7d0a0b67dd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, hosting numerous URLs on compromised WordPress sites, likely to obscure the ultimate destination and evade detection. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f5b124b24---76921958363.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/bf8d50ec2b5e4ecf6040504c4a78508f/konurirezanosapaxanemuge.pdf
    • http://bestorkate.com/uploads/ckeditor/files/nidifugofu.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba760d3c888---63730756836.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a96ee8c2b86---24427880178.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160771a31effaf---ribivubepixejekelivazaz.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a4142a3b1---pibij.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ctv2qii2aidq1qqocg1e95onvu/91819625611.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/692d2a9347f2414c182ba08e3ddefdc3/mitimirisixo.pdf
    • http://braciszewska-klimek.pl/fck_files/file/tonejuwif.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/wilepiromusojiguze.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc810f1faff---xamizuvewojamizaluvivoduw.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0d3f94e658acf01349309a5515511e49/gefifofowukidik.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c2b76268f---72022021275.pdf
    • http://kamnitikamini.si/upload/files/7754574273.pdf
    • https://betentour.com/sites/default/files/file/67884759420.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a581ccedd---93157226663.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce842cdf048---91407323144.pdf
    • http://dongphuctqueen.com/upload/files/17982866927.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcfa254f3c---jekowekotesepaj.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/dusod.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/99554084796.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c354ddd95c5ae3e516f34d07e7a714b3/47005614931.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f26d6df0d---pedegajixonopegi.pdf
    • https://anfauglir.com/images/file/fiwupetilatizajasowarefuf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hotels+on+49+gulfport+ms
    • 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_off0000e113.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 16792 bytes
font_01_sfnt_off0000f925.bin
2dc89685abd12cacd713c7e69920e2134a4b63b7b70b9d4a0cff4ee5b266c07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 16924 bytes
font_02_sfnt_off00012574.bin
65bfcac0e1a7ff67d52744e7aa602fb688115d1f0ae489fcd03fa5d805f29f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12574 10784 bytes

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