Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff714ad3836a6453…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 22:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0bd579817170f9f445d32bcdb28a818e SHA-1: 784e54c56d0218bd614f5f44cbde6d53714592ab SHA-256: ff714ad3836a64536246dd7e6b0e98feba0de5ebea1ed3a7d3d4f8a127155e78
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs and links pointing to potentially compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URI patterns suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=edit+android+apk PDF link annotation
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/9rctddu5qko7ni9o5aq4r8co5d/jofoduxid.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/11e1919ff258a68a0636f2a8d1995067/lanera.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/zinoregixawuvibadelabu.pdfPDF link annotation
    • http://biomassasia.net/data_ed/userfiles/file/19173551917.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/f29ce9f6dc0acf407d388ec363b0f3ee/51719613129.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/76374091531.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/xixofawisewofizewaza.pdfIn PDF document text
    • https://zop.bg/webroot/img/content/files/wixivadog.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a8d0d9549---kizejajibokokalexepego.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/vipujofemitosene.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/mubafavujiriwovo.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/770ij4mk99slqreuqf71bnegvq/vekutikid.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/vizibepebekodafik.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g9o368qv5is446l6mvcfpqg802/55809345020.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a4b32ad81088f21cf008dde5f7054962/xulifatol.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/pk1b6bnro00jahe5akuraea01h/xuguxaju.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/wejexosato.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/r076fo11i9sui3gqm0norpbt33/58335736296.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/rizuduboresutogaz.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fdbe601a2---pujurojupituzewaworo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789570ab58d---zeneraxiwiduzojalerugaf.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_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 10116 bytes
SHA-256: f63d8aa6ce6c21d274c90d252c8a2350ae2380e27a1f0f6eb32307b07750febd
font_01_sfnt_off00010753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 16936 bytes
SHA-256: e1b82226942906d57851ea5ea88bac4e64add669c37463346b97fffdbc804e34
font_02_sfnt_off000133f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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