Malicious PDF — malware analysis report

Static analysis result for SHA-256 117599d2536af546…

MALICIOUS

PDF

84.6 KB Created: 2021-08-16 07:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 3d3a666581133d505868e385ac1d76e4 SHA-1: a91dce7b724cca0c9d81a8d7062e646072e0c22f SHA-256: 117599d2536af5464945dde7f04de33d6e6e62f022af6ae7543ac091f0a9865c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

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 http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607930f5a57cc---2185219221.pdf In PDF document text
    • https://parkettworld.com/upload/files/26437878596.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161199ede27086---9827287346.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/jifelavuja.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/wugezululob.pdfIn PDF document text
    • http://biomehl.com/images/content/files/fotinigizol.pdfIn PDF document text
    • https://menu2uplus.com/images/file/77762267296.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/6d2595ec271be001aaebb1cf274485a0/buzedukixudof.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160f668c29b282---35210732378.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/8014020135.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e54cbc33db---nalizuganozigelaxemo.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a814c75c443---rimakijisewutokopijime.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607118f4835a4---17453937602.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/38352208898.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f18aa20caa9f3b08fdc9092446cb0779/60145389152.pdfIn PDF document text
    • https://aromamarketing.md/img/files/gisawaluve.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/pebizubixexajosawasudedus.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/68376364041.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/xovolomimekibid.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b432d626---34521673596.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/buburuwafalefutasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=whack+the+teacher+superhero+unblockedPDF 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

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_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 18544 bytes
SHA-256: b1bfdd7649d407e0ba298d19137b54f30b18565cdb20a39076811f8f156d4ab0
font_01_sfnt_off000111e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F9 10844 bytes
SHA-256: a7250bc6875d468bfe61fa90b3650ef91001704d99de9d4853832988712d3823

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