Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfbce4e99ff69f8…

MALICIOUS

PDF

122.0 KB Created: 2021-08-07 10:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: af541ab9aea00a19fec9e9574befc69e SHA-1: efa9c6b3f4e0b5b3b5788133752c894d66737e71 SHA-256: fcfbce4e99ff69f81292231ba0cec36cc58087bf8ab12377a9d59d02865c4b17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The presence of multiple distinct hosts and UTM parameters suggests an attempt to distribute phishing or malware lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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://nomylo.ru/uplcv?utm_term=the+time+machine+planet+pdf PDF link annotation
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a15bf603bfb---joputofife.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///jugodul.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8737b65922d190cfae365c3faa16fdce/41782864231.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/eea2e85d189688fcc00dfe64d562f8e4/85640180101.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210626_214840.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/76136816275.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/85101193445.pdfIn PDF document text
    • http://ibb-online.ru/f/file/tozuxevokenomabo.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/62c11a2992e4fb75799c01a263d65c91/72079318453.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/d3rqt0smfqinuvkcvim613dat7/lezasanebimibitew.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/74602309602.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9b67de09---nujomefiwa.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8c220cfce---8503457306.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/97830245623.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/th5dvj62i1ld6ujm7c1g9nh56k/73743243358.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/18940498684.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c3327fc8795---48155047863.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3793de2c27---47113506661.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210626092135690.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/53714046335.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f29d360627---kenenopezuxopowujoboras.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/4f78a5bdfad318da66cdce53bad4ef98/kiloluwaxu.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/xasidurix.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/juzexewero.pdfIn PDF document text
    • http://rajakedua.com/contents//files/45377933160.pdfIn PDF document text
    • https://thepainter.asia/upload/files/levenikimunef.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2e648daf3---74596759658.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_off0001779d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1779D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FB4 10460 bytes
SHA-256: badd78a332dfaeed3240deb11a4c172a34653ee17b655cb3171a159dbf94fc19
font_02_sfnt_off0001a733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A733 18552 bytes
SHA-256: 98ba0b1be16f6ea5e479da15a2e3c8ee8a7a168ba61d8d10e76baeefead88b60

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