Malicious PDF — malware analysis report

Static analysis result for SHA-256 077952d6af048c40…

MALICIOUS

PDF

152.6 KB Created: 2021-06-30 04:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 546c6fe2a1105f485b22364cc00b1d85 SHA-1: dd7d22a5dd6378898f6998c97d303a2d05398f23 SHA-256: 077952d6af048c40be43a835112a10760e4262f3b3417f15a53e1b78385e0bd5
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. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with the 'Pdf.Phishing.Trojan' detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/1a89eei0sos6pp376aopsf8aoe/nuniwenedujosemudimisir.pdf In PDF document text
    • https://publicbridge.pl/userfiles/file/reluf.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714cfb0011b---57373689899.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/49824084635.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a238da0a619---91140759147.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/fumokorujubap.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/zepodukaba.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779f47c82c6---91511265744.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/81413539420.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7cd87ad792ce613d94507a6a93803f16/nuwonumidejum.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/rilujitevevipoxip.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/p950f1ba6i6pbmmjmhr2iqp764/36181957622.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/10127517239.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/35225003634.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077de1187c51---fazesuzixax.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854b8f7ae77---56585038960.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a73b8a7c8c---fateduxireka.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/tonebifonoximexapeviraviv.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f59d931bb5---55597258033.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814cd6ae10d---16226494768.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608585d074436---woxuzapavuxu.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/af39a7abd29db6b17f90a5cf458423cd/38518562215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cornerstones+of+managerial+accounting+3rd+edition+solutions+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F186 11268 bytes
SHA-256: 56a1170782408eda1408c8173a98fbe18d1723fd52080ee7cbcd9f2cc031ff26
font_01_sfnt_off00020bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BD0 18404 bytes
SHA-256: 76e0ed7187c696e16cd80945243713b090cc61ecca4594271f689c216854668b
font_02_sfnt_off00023c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23C51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1