Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00daa756719de74…

MALICIOUS

PDF

92.8 KB Created: 2021-08-20 15:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c2ea95baba2d81f53c3fb8ccac1fb5a7 SHA-1: ec889de943fa669e6dd7b451d3639e73c5016397 SHA-256: b00daa756719de74ecc4a6ba8d38e5463d55c7df1cd12c10d1c50c10a743e060
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage, suggesting an attempt to lure users to potentially harmful content. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support the phishing or scam-related nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f527927760---5962102612.pdf In PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/761cdb3cae22e91bb99822847e9eb131/rimazesegebemelikegovifip.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/7opsvtm9u43l2sj5m3n3r38te7/rigokugelolekov.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/gne8n2t3fdpm688qkodf46aj4h/pason.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/47365501056.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0f73d3da04b03b5322f872c1cf97842c/46040688602.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/17262583021.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/10177642647.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/dsc8ecd4trkl1q4bpqvrmrprge/74218869357.pdfIn PDF document text
    • https://gangnampools.com/contents//files/63304220510.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/924554c51472daaf3e7c6154b9628ca4/60129193288.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fed759e31---95186840230.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963d4d58d31---51866984036.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/zububufufevezo.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/78601466096.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e61284368b7---34305647803.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989f4ec73b5---26293712203.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/guwimufawetes.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/vujusolinifosel.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/nijefonur.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/tudusumafagojosu.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/pawazojewek.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f3f7d4cac---3336846926.pdfIn PDF document text
    • https://etimes.mn/uploads/files/63268691956.pdfIn PDF document text
    • http://unseretochter.com/images/file/felilupukolifuleva.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e53f607a74eed94341110827901954ac/rogirusosipadubawafepe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=android+oyun+club+zula+alt%C4%B1n+hilesiPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 19524 bytes
SHA-256: 59f7c887a4f361491737dbd4a3ab25ddd7faf351271660baf5ce13a24c2cba6d
font_01_sfnt_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 10908 bytes
SHA-256: ca51d4937c89b3b28a85af5054e2fa42ed35f620e62d9ceb522a8387712eca27
font_02_sfnt_off00012e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4F 18440 bytes
SHA-256: 9b8614d039eaeca0400cd224b911d59b55bed7126d309e7162551e1d65e6f4c7
font_03_sfnt_off00014b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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