Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b46b2abe4d7edeb…

MALICIOUS

PDF

74.2 KB Created: 2021-09-05 02:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ef43b85cf33d087fbcadc0ee89c6996c SHA-1: cf04bec02d7090bcd66cfbb3808c17c0404a7422 SHA-256: 8b46b2abe4d7edebe49f751058ff223462dcbdc6a8834f3b3ba4636172301b1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/vjrk44t39ic0bi7fifs9d88he0/wasupifibakolosanaxiw.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ffe1ceff8f---54285806405.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/73ac74dbec15d46bfcf24ee7d8e46f3a/jadasaxirederopu.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080082039dfa---82051730105.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/e06t979jhnrfndbc4tgue3n08g/woxobakebevativ.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/117ji1skufh25s01einfr45ubr/48039263894.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/nupuxabevedezon.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6c0dd4f6fda3e38e411c6b501fcb9728/37550463456.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/39472980901.pdfIn PDF document text
    • https://funbugs.ie/files/file/dewisumozinubam.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/walojubarosora.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/lukulonafegola.pdfIn PDF document text
    • https://maymac.info/userfiles/file/83941409996.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16092cf13082a9---26843041693.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/be3975b5738cd40bd84f8b2cd94f278f/liser.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/nadolijukeval.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/eb3054a9db2966827aa066df71e58d1d/14500904394.pdfIn PDF document text
    • https://laps.pl/userfiles/file/gavapulamekedijefofini.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/fugevidowovaseguzirudeja.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/88o68nfl94os8d737ioujmh534/227243944.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/gufadinadeza.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/naserutitibetuxek.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/punilasutivexamulaxoter.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/76139314404.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078eddd440a3---rifofezolowabirinuxaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=sensitech+temptale+4+usb+manualPDF link annotation
    • 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_off0000c0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C2 10812 bytes
SHA-256: e0105ea5989c51036ba19f07ac3a3af986248c349ea03faa00c4a2667f209a7e
font_01_sfnt_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 16236 bytes
SHA-256: 78ccee6c980b68b3e6dbf530c10ee4bf398d128ccbced09076d71f781ee09eda
font_02_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1