Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0eab678e5f07a0e…

MALICIOUS

PDF

94.8 KB Created: 2021-07-01 12:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 18e7476748602da778741b80a6652a2d SHA-1: 900d58c6b4a8b0fded8e1bc8d0a361ac73c28c13 SHA-256: a0eab678e5f07a0e55f6aa918d2a50935deec3d37c6ce169a402408af637e2ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://catamma.ru/uplcv?utm_term=shraddha+kapoor+hot+pictures PDF link annotation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/hs3ru547h667jl2fkq39rknevi/11744110716.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/96668260867.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/zazoxegadolukapuvadu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7bn1e0gktccvar3k6v6m9hmv12/26733881147.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/1675982631.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/eab07a22f1e527cb100a27b85272b82b/85157425957.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/132dc7bf6884c4db9a180b408a12d7c0/zadef.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a2e89a96ad6ca6e7b49d505223553e1/mefabigokogagetivekavu.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f707d79b43---69521361829.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/n46bo7r4qavvj1b1jts4nnflvh/vovukomuxulirikawoboba.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092114211bd0---lotusegomusivetexuxarirak.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/n4npl14vip1qmia30ph4vijdhh/18128179540.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c40555b33---kezavanu.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/4ee7aaab449b7ff1cf3a735b7c61920c/kazuvedivulesikejakuduxag.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/54510227989.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/tujivudoxef.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f87d54b5b3c3c7c75f5fdd7ddf247280/95720584674.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/s48329jpdndlpt0vj2ts2bcfc4/47511003888.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d77ef3e3d---tijavotojesimakovivabesos.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/a133c0ad169eafaf49abc285c633eef0/gurirew.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160831e829db1f---40048931602.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/31d9e6cc5b24a7d6146ebf6ed999b475/88844348975.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/24768700416.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c9723b48b---28791580345.pdfIn PDF document text
    • https://edarky.net/data/file/wurozomebarojewopixid.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 18132 bytes
SHA-256: 0a1d4e9cb3bd95e8a427f8c1f780c5bbf01139026f4d239bb42356996164b5a1
font_01_sfnt_off00011c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 16352 bytes
SHA-256: 470e290952ef951ede6d6c7d5ca63c035db2632a033eb4bcd74a8159b858b555
font_02_sfnt_off0001325d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325D 2224 bytes
SHA-256: 338b11d291939855dcda84083ac28f2e0bba756a12b47a5d7017b800cdcc0195
font_03_sfnt_off00013c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15441 10728 bytes
SHA-256: be4dfdcb662102341ec8963641160dd2d9398cffeb03f4c0e9e69b14b3a083a2

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