Malicious PDF — malware analysis report

Static analysis result for SHA-256 494096e49c541658…

MALICIOUS

PDF

89.2 KB Created: 2021-07-15 21:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 47fc6440dc88624254feca289046d539 SHA-1: ff9ac069a4fa52c6c30f15f2c0f711253af80384 SHA-256: 494096e49c5416588948baa20088df5f3b9e643684ee000312850e3e694bc21c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links are likely intended to lure users to malicious websites for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090b717ad755---kolagugifamijojifezawug.pdf In PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/10619034895.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/kevapipo.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c6b13c4034edd9056d8df4440c43d93f/lujonoxumokevilipi.pdfIn PDF document text
    • http://geodez.com/pliki/file/gizuwiludi.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7bbcacad---23629953273.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e38140e8b---62145650993.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/fizegetetiwesavarupij.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/51057470353.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/bddb197653a77affeb2978011faa397d/59951286493.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ff583d0cc7cee815de4c60d209f74ff9/73856576902.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c54ec60cf---mamok.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/7asg4hg4mi610l2givkm1sqv2f/37514916283.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/60860003146.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a075cdb1975---41946627825.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/xogabapijalas.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/effjave07vs82f65adlnlgjsoo/38332239068.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a28ec00f6c0---11822875333.pdfIn PDF document text
    • http://growourworld.com/clients/83159/File/4335296885.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/67992372962.pdfIn PDF document text
    • https://alutat.com/data/file/67579094723.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/14122301596.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f30d1490c---58601613006.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/55436024752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=proper+fraction+to+mixed+fractionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 17744 bytes
SHA-256: 79e3273514646bdc409583a4623a50d0e9c009fd127d94979455e976cc955003
font_01_sfnt_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 17056 bytes
SHA-256: 2f7f5f8ae27073077aae3227adff65e20aa0f47a2bf104985c6d060a658e9831
font_03_sfnt_off00013e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E96 10672 bytes
SHA-256: b709ecb490ccabeaafdaf64c27c23211c674556f71212acbdda43ffb3830f086

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