Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff08beaff60e4d0…

MALICIOUS

PDF

119.1 KB Created: 2021-08-19 07:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8c8153accdfea8a5a43471342f989c0c SHA-1: 67dc517d334b18c31beeec60c08d4159a16f74c1 SHA-256: 4ff08beaff60e4d057cc0c79bf7a53651402ec4363aa9774f547a0cb9d21dd01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=libro+oraciones+de+guerra+espiritual+pdf+gratis PDF link annotation
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/fupazuwunedif.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/kixaxi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be1814367fa---fomove.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/ddlkdtt8sp8spr77qb8ahur3fi/4531750344.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/josavobusisodagemi.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/u02rgpimd0lc8ak8d1311bb7bm/82468682858.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/44794487971.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22d6d14d95---6497526738.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/tudapozabu.pdfIn PDF document text
    • http://xnkvinatimex.com/uploads/files/74979242522.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/2da982c2392f88e541dfd220839902c0/tevaviponujew.pdfIn PDF document text
    • http://www.toptehnik.si/images/finadufitediboxe.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/58270810288.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/15d59b29a69340592c151d6bae5efc7a/27232729219.pdfIn PDF document text
    • http://langmypham.com/luutru/files/jezuxun.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/xepowudelu.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/42072867233.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ee75006fe---61285836588.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/kejelenewafax.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1ab2fa29a8feca38860d66303bf8429a/27418578339.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fe4c9fb5a68---zitope.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/k4lkgls8tg53fjjigj5u1od1ip/taruruxanakilo.pdfIn PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/20074081217.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D62 17788 bytes
SHA-256: 4bc55eb85230878dcaa1a184a0af3c6c6dee0747b6f6b2288c8e8bc17eaf0752
font_01_sfnt_off000199f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199F4 10992 bytes
SHA-256: a652fcf39933cd15f280f716754b4ea295fd6aee38903e1f0ef15dc5842d1f13
font_02_sfnt_off0001b32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B32F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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