Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6082b30c9632ec…

MALICIOUS

PDF

83.1 KB Created: 2021-07-14 04:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f1f07b07a30ecde1fd709a02a08cb94 SHA-1: d26cc99eb7c6a798ea64e0cc1fbf833259f55919 SHA-256: ea6082b30c9632ec42fff2d71f2690abf887feb29d087aa763bd458d9008248c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely serve as lures to download further malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://daulte.ch/ckfinder/userfiles/files/xesujowiroma.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o6q8gkr5vap5f9ia1nens9rf8o/vixuno.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becb3670dac---zakenisuwi.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c88d15686---15084778276.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08a2dc5b6---wuxizukanegutugudaxuze.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4105d448669df931e3a0fc107c8d96d0/pelinufujolososexirone.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdac9518eee---japigesipa.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/c0nm6iq85mev2rp67f4fcurkcl/73838080440.pdf
    • http://allmedicus.com/userfiles/file/92894981451.pdf
    • http://el-master.ru/userfiles/file/visojafixemosugaza.pdf
    • http://fixafilm.se/userfiles/file/48639077183.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eae4d9fde---17744259501.pdf
    • http://gillsandgeckos.com/userfiles/file/38133988794.pdf
    • http://jumpinfit.it/userfiles/files/97389020915.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd8e9ba053---zosafogebuvazefi.pdf
    • https://ngusacdon.com/upload/files/5201727870.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fa70dc76e---pofutati.pdf
    • http://automotiveenergy.cz/userfiles/file/tonari.pdf
    • http://radio6deenero.com/uploaded/files/fegof.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/8fd0da11348907dbc2b3f37072cbfa36/2029646366.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b99b85c6557d7a4f62151d446d9850d4/tobifudasanedufetawojoxer.pdf
    • http://screen.by/images/file/57933007132.pdf
    • http://logisticsnetworks.net/ckfinder/userfiles/files/gafabaluwujulinomi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gonorrhea+in+man
    • https://medlineplus.gov/lab-tests/gonorrhea-test/
    • 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_off0000e614.bin
4781eb61f089aacf2ca37f19044c1abdcadfc365418f3a025b2503de22161a61
pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 16512 bytes
font_01_sfnt_off0001110e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 16792 bytes
font_02_sfnt_off00012925.bin
34648712478c6dd4fe1573b83d7328020ca009efe74a9264286c68ce75e2cbdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 10100 bytes