Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d68accabb26e73…

MALICIOUS

PDF

99.2 KB Created: 2021-07-10 01:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ea97357c00d93dddf9ff6fbc9d29933 SHA-1: 2b2eee5d70ebe4ac1e1163e419c3dd5ae42c5bb2 SHA-256: 70d68accabb26e73e81bdf33f1f10d14fd4dfa7262453dc59b92db5c2bc3ad4c
156 Risk Score

Malware Insights

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

This PDF file was detected 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 upload directories and other disposable hosting. These links likely serve as redirects to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3348e16efd---dexurazewifikulopam.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5a8ac72d0---44903623743.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160729b44159ed---bixodo.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/0cgie0pgqhajl083oitv9as42c/xaxumijopog.pdf
    • http://ubest.ru/images/file/3328212706.pdf
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/92785593658.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/c3fe52c75d0d0d3c63029d50f230fe80/mutiru.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1e8aebaa3e7316e6ed7096e8f3e724c6/gagelopunufalokexawudeg.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/506ab7cfe0c0d23b1797b2871a12b43e/24943667858.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/45687052680.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/86ea60bcaed04e462d48771d5670766c/digugikamekidopeguwoxiwe.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/71405261731.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/e1f1e579f8c19176ecab92ba78e00a64/11125395341.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737bcd158f5---31309796511.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160bf88935313e---kesofisukisikevebelofuw.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/765cce443dc7a2963aaa3b01e7abb0e2/dinejewodudazimuzovesi.pdf
    • http://asckhn.com/acskhn/userfiles/file/runumogadekugaxedexa.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d427696a99---xejudekuvuzagiroxib.pdf
    • http://haphadoor.com/upload/files/gisesizo.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dae28eebe7b---69867284987.pdf
    • http://scheidenschiedam.nl/uploads//file/24832825269.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/f6390910nhkt4patlomb5ve2dm/lijegolipo.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085794190014---43555220205.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5e259609---jokaxuveguxesozu.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43e162b50---54420389915.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=town+hall+10+trophy+base
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001221a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1221A 16792 bytes
font_01_sfnt_off00013a31.bin
32c4779cf4d945e3719ec86c0b7d073ba8295c4838d45f278576150fa80e8201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 10736 bytes
font_02_sfnt_off000152bc.bin
ee89e8e66a7276fd1417934644a23f6afdbca43063bf3e234622d11f79fdc606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152BC 17096 bytes

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