Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2c111b3478c2d9…

MALICIOUS

PDF

273.6 KB Created: 2021-07-03 18:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64e7e6e54e5288ae64434992c550a62b SHA-1: 54afc377c1c81292e9b64dfdc1d4eabd83f2495c SHA-256: af2c111b3478c2d9557cdbee6f58bc8f283daa2a580c0059d8781757f700b89e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains urgency lures, such as 'account will be terminated' and 'action required within 24 hours', designed to prompt users to click embedded links. Many of these links point to compromised WordPress sites or other suspicious domains, suggesting a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=typescript+nested+interface
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2417924ec8---makopumefisamupolumivav.pdf
    • https://cafesca.mx/ckfinder/userfiles/files/mogajadasojirapun.pdf
    • http://cs-web-design.de/ablage/userfiles/files/logumerisex.pdf
    • https://hospvetcentral.pt/site/upload/file/wijen.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160baff5ce5d8f---sinososeluwoximizowuromi.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/sezawisaxuxoki.pdf
    • http://biznesfishki.ru/files/userfiles/files/lunibudavudagazax.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9d5fabcef---88493433539.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070fd5cb5583---bexunizozuwokopakum.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/qoug8dmvcqsmeroo1j3a5ojbtt/perexunubigibup.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/51eb0f7b7e65ca87dee4e772b4959d0d/xuzeses.pdf
    • https://mumegram.com/userfiles/file/40089901014.pdf
    • http://wawabed.pl/uploads/userfiles/file/72064409514.pdf
    • http://veterinariacasettamattei.it/userfiles/files/folidameka.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bf51c2cb8ab062a7d5fbb0a7ee0db162/pebeg.pdf
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/2ca2fdbaa5d038a2149f7dd9b0616010/zuwofimemudozadigiwozax.pdf
    • http://naturalmis.com/userfiles/file/lununagujidotawezige.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7147a1558---retixisexumonanumugesuz.pdf
    • http://alemotta.com/resources/original/file/82673135649.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb38dceb835---25451298717.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dbcc90f9d---45843344281.pdf
    • http://kistours.hu/userfiles/file/52721063556.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083624495ed3---57023000642.pdf
    • http://eko-inwest.eu/upload/file/mowarijuze.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/1cb0c554da13d1b058457770a4408b52/valinanutajefemurenilom.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/2dbe556dabc6ca8da96fa41bf52665e8/73296123573.pdf
    • http://naturabliskociebie.pl/userfiles/file/16316180387.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00038282.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38282 16792 bytes
font_01_sfnt_off00039a99.bin
0bd0c5e76f3e36684e8d96c63ad150e2ff4e7f25c002701cd1e18e96be829810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39A99 10524 bytes
font_02_sfnt_off0003b2b2.bin
0386a1c13e6e24afeae3a6e9ab8ec32f3cbcd5598a0e2bd3099080bd2aaca191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B2B2 16296 bytes
font_03_sfnt_off0003c8a5.bin
4ab08a0b9eb14f7918eff467a6b2e57a1fb92e6fe08d45483792ef90d540e986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C8A5 11708 bytes
font_04_sfnt_off0003ef4d.bin
237d352424531fc55d860357969eb151bef9bbb276b043e9a8cc09a84e9f6dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EF4D 28828 bytes

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