Malicious PDF — malware analysis report

Static analysis result for SHA-256 092d0adb707921f1…

MALICIOUS

PDF

84.8 KB Created: 2021-07-02 01:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 26463378f6591b5c14829877dec94cb0 SHA-1: 475f82e5dde8357403efcc4a0cde678b4f0ef14f SHA-256: 092d0adb707921f15bb6bdcc6f7a86944ee51c6a6bd187a00c61c85596dacdf0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to redirect users to malicious or phishing content, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5rn605vbtnpqg634tind486a17/relemitotodazufazakopaf.pdf In PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/pebiniwivoja.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160839104bac13---kejotixol.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083c01925496---buwaxoz.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210528_61742A65538529FC.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210701_3EB278C7093397B3.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/86993d94f4e177cd4078a418be382427/kisepemefolewitebego.pdfIn PDF document text
    • https://baongochoa.com/upload/file/lepubomajovekij.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d69576d0e0---60671961518.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/341472c87d23c5e8e3c1d5dc97d877d5/besekalobex.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/75226932999.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/mijegerefuv.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/20826870657.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d8f8cbbe6---63389702121.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e36d6202e---wokodibozodolivi.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f0d9e74b---katepowomiburetupelomujet.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/28636542922.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/vonez.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/468d546725c3b10668702017ae00fbad/danavafiwa.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f16c39161e---bepoxejabakedem.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/dupubogexewuzomuvanukaxer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=image+to+cad+converterPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 24652 bytes
SHA-256: c04f006b6d5a586bf858017aaada2af6f2b827fbc61c78a13bf490bf3d2673bd
font_01_sfnt_off000119ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EE 10424 bytes
SHA-256: 58f968ce0ab648b5fdd0b30c7245d86c286a5898894c5f2334baa5b55010e42d
font_02_sfnt_off00013157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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