Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb974c7304bf5c30…

MALICIOUS

PDF

77.2 KB Created: 2021-09-03 16:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d02f0c2d9c1022986152542b80504600 SHA-1: 17470c430b33a13336be870975bc2c0dfb341f30 SHA-256: bb974c7304bf5c3062e9260b06761b2ea80bda5adef8311425f307f9c5461cb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to various domains, many of which are associated with compromised WordPress sites or disposable hosting. This structure is indicative of a link farm designed to distribute phishing lures or redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ankaratemizlikcim.com/depo/sayfaresim/file/16405396733.pdf In PDF document text
    • https://migger.dk/userimages/file/31027218828.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/17924890597.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/rezakakujumimebolarugoxax.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/161153f3c50034---nalawafifiwojaguvezavula.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/20661496367.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/450775a9a88330359361dfdce5117fab/96028342469.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/fivilawidegavej.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/lajisusumosos.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/xilemejodexafozuvopa.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b26f40b67---64571497562.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d34505ebb6---ninezaw.pdfIn PDF document text
    • https://papiratisk.cz/soubory/4326652116.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607222ef29764---zowazizetokodi.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/a34916d1a918c8ce8dde6c89494e4c1d/85209729304.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/jemalotodekolezikoke.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160754708e7a33---23040083142.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/43945180366.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/cc3fe68e8cf1020f54a7dc3b652d7a35/tevobifiruranalosux.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/23890668089.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/14164c14106f226cd0eedd346d0da8c2/sotifusipatopebese.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/77138162084.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/17492707593.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/iapp3pqpu3pomtvcbbodqnoaf7/zefizuzikiletifapejedik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ceratite+ulcerativa+periferica+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_off0000c6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D5 10416 bytes
SHA-256: ba3c712c9aada67f8e1d17fac89a447bdaa26aa789db63b77396f65adda8af04
font_01_sfnt_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 18484 bytes
SHA-256: b979310841b0a7df74c410867d706b09b56177bcbff0530f0375eb1018a1cdf0

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