Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba42f897498a87f…

MALICIOUS

PDF

76.8 KB Created: 2021-06-21 20:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2434c324120ceef2183123db1bdd5668 SHA-1: ed00a7bcda47dbd8abaaea822047b39f706a562e SHA-256: 4ba42f897498a87f3e038d264112d541646cacbe8f9080e94af73d9024a8e66c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/uplcv?utm_term=grade+1+literacy+worksheets PDF link annotation
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/hg2id9o83h0q36vd9fifl0ek48/muginomog.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/p7llbqqnqsbb8mdvl4jibin0un/13923868840.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607612a27dc88---65245120855.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/grt08528qsvf0v9sd4mmm40kvd/92504920756.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/kl7jt923d595db8upfm27s2bd0/37486893499.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076261082bf3---wabozirog.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb87f83c1a5---20645221855.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/5179731878.pdfIn PDF document text
    • https://istanajp2.com/contents//files/vototezaloxawivabasibo.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/5c3be9c6f1a106878b06bdcea2eb923d/pajadev.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/0727t64e7gv8dgim29shchqsv0/livunalajowelasenedijipi.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16083f497917d0---kavifejixepi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9286b167a5c912d9bfcf2398a9adfc52/2561600080.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/gumiwajetu.pdfIn PDF document text
    • https://diphong.com/uploads/memutaboka.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/ab68524fb8d4248d2cf7f3b90a88945f/viful.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/betedazilaxilijuwunot.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/e2ck6t46g31go2v9qtuoit80ab/felelukuxuzumatate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3F 5052 bytes
SHA-256: 0d0fe977b53e0e472f205efa0a27a398983747e9ffe7f625012fb112ae9e26cb
font_01_sfnt_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 10360 bytes
SHA-256: c759fe7f22270a7016d824c027e62c18b2706d5f5f28cd7e258987fa4aa0808d
font_02_sfnt_off00010245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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