Malicious PDF — malware analysis report

Static analysis result for SHA-256 4460a0312723a067…

MALICIOUS

PDF

86.1 KB Created: 2021-09-01 03:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 075693238fbf6d439708717c702e0f4a SHA-1: 1564cc5e902e30da7fd9943e5131f8784ec6d1f2 SHA-256: 4460a0312723a0679c4cdc9c8fe39c78c66bcea336cc27a62d68a1926e73bb38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload storage. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://oniceh.ru/uplcv?utm_term=2019+frontier+owners+manual PDF link annotation
    • http://modnyi-buket.ru/uploads/files/peluradoboxepi.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/fodolixugefijisiviwagug.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/nusotivefo.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/kobonemumumi.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a090f06c0b3---48663667390.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/29915523573.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/97678794132.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/sabaniseluzagagajanin.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8a14f5111a47260f9d64a03ef692c583/64441976559.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e9f8292d3---50423993759.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/87a67b6d8ada0bde0698c0ed19fceb9e/24519076099.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bfd41daedc---gozozog.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/3c39c34af3d66991b06a1dbe635b9f53/jovivunetemelulukunodix.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3127a0c28---83034565927.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b303cd169d7---81444463615.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/46435385911.pdfIn PDF document text
    • http://reflita.lt/uploads/files/23487178989.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/22048274932.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bb4057b5e---jafete.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/5538303153.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/tadibiwimetopokenekevore.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/fadodoledexonuliv.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/letotipadejokekoredagexux.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/lukanituzawununigitelexaj.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_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 17716 bytes
SHA-256: 3850478ab3c2c865a85060a37db5d8e4b7c9c165d606cba702447f5452f2a44b
font_01_sfnt_off00011890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11890 10924 bytes
SHA-256: 94385d3c3cdfa4967798cc71b2869cc63ba482f5c2eb4188d42d399f54c8dd50
font_02_sfnt_off0001320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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