Malicious PDF — malware analysis report

Static analysis result for SHA-256 d593f1e448bb1d6f…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 12:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d68b77372e23c7c3641d13b3629dd323 SHA-1: 604c84001e304f2134bd54a09d3fcd0d43bd45f7 SHA-256: d593f1e448bb1d6feb62e500642206788dc3ec53129d789f17e64fbb79e2e636
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm or phishing lure. The embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=how+to+find+chromecast+on+iphone
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda7090216---rozezewosewefowani.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080846ed8c36---surikoletepudode.pdf
    • https://angelsstaff.com/uploads/file/65654498548.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ebac20287---58925000550.pdf
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/pasafasexumedodiwe.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9ed371d65---dukororijij.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d8230bd27db---16215322482.pdf
    • http://weifong.tw/fckimages/file/vudafubaf.pdf
    • http://www.irrv.org/uploads/files/kipivalozusivoxojetapab.pdf
    • http://fouladsazanco.com/Upload/file/xanunoxivap.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8e2dc4e78bca04d7a59141da13fd140f/66576878707.pdf
    • http://www.urbanwaterways.info/files/pefodiz.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/2632195016.pdf
    • https://blokhol.com/upload/files/43951866905.pdf
    • http://esipro.fr/userfiles/file/wijulatorekada.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/67a6de1a1953066e19dda42bb639ceec/vufezikizamupedofapeg.pdf
    • http://ohana1bbq.com/uploads/files/26617917697.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fc1257c4e912ed12fb5b420e54bdc38f/kirapimotelo.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e61c3f5a9---xipakitukutimumuw.pdf
    • http://mamnonlittlesun.com/upload/files/bipokoviwadaxawe.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/9glr4af0j92vdujpnk0oce61fv/jifagazetojaxarorinej.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/03b1e6c5f277cea78246cb10e3bc7442/71919747619.pdf
    • http://abpaluso.com/upload/file/xogufinovekedozitisivimo.pdf
    • http://limoride.net/gallery/file/timarobivob.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_off0000ec5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 16792 bytes
font_01_sfnt_off00010471.bin
ff9895449471ab7a5c9f5245a4dc62e38ff97ca962d0e8325d2a0eebf3653288
pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 17704 bytes
font_02_sfnt_off00013227.bin
512107a46ab61ec68cb16456ac59798dea030ad4a884d9ba8c7904ead9ebc8c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13227 10916 bytes