Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d72d5c9c6ab439…

MALICIOUS

PDF

76.8 KB Created: 2021-06-30 12:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 74e9542c4dd3effebe68665f192fc515 SHA-1: 5e6d2e4263218f41d9a8651511f73c9b2d801b7d SHA-256: 62d72d5c9c6ab4396c647af7fec243a0cf18fde787d3c1467429bf7938ff638f
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are designed to lure users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d25660750---dojopa.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607424497fa01---donedibatomafawu.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/546cece8f25b92286f9f327ace77d4e3/milaloxatoroboje.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/lapagilojupak.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/adac894b12676d3fbf1c78858239343b/72375961972.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/vurezoxow.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/tgau00f627vumf3khc6itsucrg/jutad.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/11027402027.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1624031329.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-30/20210630015216135497.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0464afa48---pusurefugo.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/bopuwozelem.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/87447908206.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/af74207fa4a1b640b3f2a85ba0e98c53/93951219840.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/91317b5ef970b352e1fb37dc46b558df/26033157940.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/7024916127.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf68ca4c06---fojifuroraxojepebujinus.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/38748296794.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608450473d97a---41001414269.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/1ec8cffc4c8c59196dd74b4a052328ae/49179690577.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/fotufexunujat.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/cc5758757408c0544299d27f5d52bf5b/66766691185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=settling+up+meaningPDF 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_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 17172 bytes
SHA-256: 50e2489544f37371028a6d74af95c6a501f9151422b3a3aaec08c874406206bc
font_02_sfnt_off00010d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 10380 bytes
SHA-256: df5e1e54fbff705aab0e82dbadb65f4b0b9bd56873aa70f03f26d2e5fb7a7ce7

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