Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c372f837a9ae8a…

MALICIOUS

PDF

99.7 KB Created: 2021-07-13 16:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9bb5c2582985f5bf4691333d0145d1cd SHA-1: 0fbcb3ad4819b2cbee65977e1cdab594fa872e89 SHA-256: f1c372f837a9ae8a31149496fcd6516f3b12de5aa3a74d36fe480c795eacb087
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites acting as a link farm. These links likely serve to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=collective+unconscious+and+archetypes PDF link annotation
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607add90814dd---25405426651.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/tonusiparadawulidakidesaj.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/m9k9e2ben2s1s86mqrhu7piuj6/morej.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0d069c46---18439345196.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/radusavunavidokopizo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16079024be52c4---bokiziputirixilanozevamu.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/77802002547.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/lupasovitojijowuluwujozo.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fcab8fd9b---dubekovorozelerizirizogi.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/nufofudalul.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4c75f437342fe5674cf1366d3ea2c0ff/gumitilogivezaxap.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/9brs6v7ne79p703qu1u3hmoclk/88432536029.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/towosorukamo.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f8fa7084---4985683438.pdfIn PDF document text
    • http://thebaileyfamilyreunion.com/clients/6/6f/6f45d7e5c9279c15d0bd3a3fa6949618/File/48722537642.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/nixepidebomafiwo.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/tie8tug8vbe350imgktugsr2m4/84246196218.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/296031879.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e0688c53---zimigotukofar.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/4d357cd0770b16c5dca5d3a8948afef7/lekupebo.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/toxisifi.pdfIn PDF document text
    • http://gapp.fr/medias/files/vekedekavokusam.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/mogevo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001240b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240B 10920 bytes
SHA-256: 7c14cb1fff7bc7eae488db66b073ab5abd2c2c2c18cabab0a55748c49a317df7
font_01_sfnt_off00013d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15570 17052 bytes
SHA-256: c3ba3ad17e518299e1871bac64b66338d206e2050877d745bb1629117a2ae67e

Open this report in the interactive analyzer, or submit your own file for analysis.