Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48250a4b8f6f16c…

MALICIOUS

PDF

86.2 KB Created: 2021-07-04 01:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4afed377e4f177640eb9081f161ada6 SHA-1: 210215e2b1f779dca3e71ed57f8692b9c2406238 SHA-256: b48250a4b8f6f16c12a6178e1078674b02c4698a6f7288e6eeab15701ea0b368
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of external URIs and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5ebba0b64---gixuzexuxatidezudebi.pdf
    • https://lifo-sea.com/ckfinder/userfiles/files/faxogefopid.pdf
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/vinulasoturuxeda.pdf
    • https://ratsimae.ee/media/contents/file/godozererunilomalufinarur.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/25441192249.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4763b3ebe9---31480917444.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba783d1bba7---tirajin.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092744d87d13---49306616670.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2cbc20659---tizuzuwodesewovupe.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608097807a079---mijuzuk.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ralaad8oig9rgha8q1moa5dva4/wuzutexeto.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb842ab9c09---13473901366.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e98d4758a---resuxez.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ea1c1ef1423cb2bc1d7b9d539b4032f6/rimijesibonujafat.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c81a5528f---gusanebuvosone.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e87f88e712.pdf
    • http://rentaruedas.com/files/others/radaker.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48ef42aa87---49229871019.pdf
    • http://alexandraharris.com/clients/36054/File/kotev.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac273e256bb---66494519926.pdf
    • https://techson-cctv.com/upload/file/16468112287.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/be53882034674f0d0af2c50ea18ef8ad/52020067770.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082e44120d47---43747284933.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607470b0ddeda---91477422734.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/mua3d8t4jnlps783hgbhv4s4v1/xedipabasuziziluratuzoja.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fictional+characters+enneagram
    • 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_off0000eca0.bin
c5b03ce30bb13dcdf3ce26d8ded316bdafbb3b2d7693eee99aef8080a05dc01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 10656 bytes
font_01_sfnt_off000104d2.bin
e2583e6ccd799d4930683c7b1b733942eb16b7bfec0c18519aaa224cce08a3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D2 17340 bytes
font_02_sfnt_off000131be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131BE 16792 bytes

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