Malicious PDF — malware analysis report

Static analysis result for SHA-256 698e9edf72fc7502…

MALICIOUS

PDF

82.2 KB Created: 2021-08-29 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7e7ef3955906c4773ed10c9ba3d55b64 SHA-1: 7267e82c4246b02f27c037ba238fbbc6e3a8a7cc SHA-256: 698e9edf72fc7502f4adcf91e6a76521e4e0b6383fb8fbd3d325855d3b0f824f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites and disposable domains. These links likely serve as a lure for phishing attacks or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://inwebjor.ru/uplcv?utm_term=powrtouch+evolution+fitting+instructions PDF link annotation
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d887e2dc667---jozijewivawoluwirokam.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161048e72e8b7b---60693828187.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/15799749658.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/1896598551.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/nakajomotaradelesivujob.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021050916540271182.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/60574182701.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/riwopajanifuk.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/60700666055.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b05d97273---26935424243.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/nuzotububamode.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6376ab6c10---darisokefikoxavo.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a89dc6d408---88448737608.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/pizosivefebetotilo.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/19140365242.pdfIn PDF document text
    • http://lyshiying.com/d/files/36725345137.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/02a9038bb26053a92a16b3ca8a65b9ed/nusugepowefuzapunut.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/nurowuw.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcafe773b13---zifugikelijojuzebejud.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ca64ff468d1b4b508d539b9becc33747/luxifixufiduvoga.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ce87e9bfe91f734ac102b48e4aca45a0/reforevusafuninofegiduk.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aefc27c8a---wapiwowomasiva.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/48894115741.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f631b2c8---sirinupuzodiwanoditax.pdfIn PDF document text
    • 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_off0000dc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 17500 bytes
SHA-256: de681dd0614be2342208f6a249f13910ae316cac0ffb147d7b5c4de4e0859695
font_02_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 10708 bytes
SHA-256: e4b8897fa54127b8882f088498c0774feceecdfd14098a5e596f6365e4b6f007

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