Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b002e69292dfae7…

MALICIOUS

PDF

91.3 KB Created: 2021-06-29 10:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a571c09c6e63294493d720623179be33 SHA-1: 9ca2e9500b6315e1bf57722ea1f9767558303baa SHA-256: 8b002e69292dfae7d71462598cc7352ab4a88608b2fdae833ef4b431e3f26b16
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of numerous external URIs and the nature of the hosting indicate a likely attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a97de120cd0---38360570732.pdf In PDF document text
    • https://anjingliar2.com/contents//files/99786345112.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/54618418549.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d36e96248d---domunasafotejasukoxarixi.pdfIn PDF document text
    • http://candientuvibra.com/images/file/53297129963.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/82678893558.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/2bfd89b44b058e81c6a862f327a28f02/16811139625.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086fda7e6c38---lufuvelapipopiluzavo.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7e6c50eda---xopusonozonaweluz.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160824986c428d---sematego.pdfIn PDF document text
    • https://network-italia.it/file/53071975266.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160703f8a1119e---dadovofujipigurojogezi.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/e56279d5743f7641de0f33de666d1626/tejiguj.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16083fa72442b1---mumifopufomumozunapulu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/46c2a878314f2beb95f98b525a4afccb/38441517145.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5b941f17b---52629536632.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/vutekakafolewuvetiv.pdfIn PDF document text
    • https://anakmeong.com/contents//files/pibef.pdfIn PDF document text
    • http://www.celso.org/download/98427009026.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160719a3873fce---fitazot.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/fosileridudadik.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099928fe44a1---fobafenasuveladozotomaso.pdfIn PDF document text
    • https://bio86.net/fichiers/fasomonafaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=jcheater+gta+san+andreas+apk+downloadPDF 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB73 27592 bytes
SHA-256: f811fa790599023db3bf2ec72a9fb2bd0fcbc81af3d7c5598cd149724bc486de
font_01_sfnt_off00011349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11349 17112 bytes
SHA-256: 885b9024a80bd539ee88f4c17c1e1fa3cc6dab475ff5b740ebf17c73a317c9ed
font_02_sfnt_off00012c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C30 10872 bytes
SHA-256: ac046bf4354950e26eb868c1fba720834df3f115107f81c5c907f16490a98312
font_03_sfnt_off00014532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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