Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da78ab12c847e95…

MALICIOUS

PDF

90.0 KB Created: 2021-06-28 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da2d353c7da7f43133348b893fd17812 SHA-1: 30fdb9c52bb50655b2bbc1833be76656705bda18 SHA-256: 1da78ab12c847e95a25a064bbde72695203875d395b88a742ca4f46637ee1f51
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised websites, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download' button lure further supports this, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/73e709acce60327cb60bd973a4f7fa94/60569506599.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab47af026e9---dazuvuwoxututoro.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5dt16e33hafnm5kgbh43788ijq/jenama.pdf
    • http://staropolski.net/Upload/file/65329837770.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bcc00d63---19497196052.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609e21f976385---suruvi.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160816613355fc---41431621499.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a9ce131c---53087565672.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/cbe9c9c79b9772bc183219165b542fbe/31523148016.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/ab4c5036463a7aa2305d47aa2986bee6/poputuzugo.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/7s09kbn4jv0r6d9he23l1ii7bv/tonafipurelodasizal.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085174c64250---melolipesarowubulerup.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8th2rhpm0aejtfsh6esal8vk94/58655706579.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7acdf347ce9164faa9253d9a3bc9d03f/xinetuzobe.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/60lo8klcavh6loiip9m7ach0in/fajagunowomulugigok.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc9424c6b4---medoperilutogi.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c062f41ad4---67204869063.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5c1bc94813a434279c9ec1911c65d851/fobelizefivegozekudawun.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/61511251257.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b4db877f---guwokujavum.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863d4a7fa9c---46340016110.pdf
    • http://bluekeydigital.com/images/pic/file/7957660135.pdf
    • https://tomas-music.com/contents//files/jajutiliwexedovusezetol.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a8e02da4aa7ff86509e5d896c1ceed11/sititosobuv.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb3d6ca250---96755001630.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=download+express+vpn+cracked+pc
    • 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_off0000fb0c.bin
dfb61a309dfbe4e536673429973c064b63930995bf2f546bccb6c8f0e40a49ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 17200 bytes
font_01_sfnt_off000127f0.bin
ff092c317115bee56e5805ef9b6fb9121befe96f30c8319d13ef945132e629c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F0 10664 bytes
font_02_sfnt_off00014094.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14094 16792 bytes

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