Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d29f35ab10c4eb…

MALICIOUS

PDF

83.6 KB Created: 2021-08-04 12:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d8f7ed40a17bcb3f423ca324a5c2b42 SHA-1: e84c9fb175a5836c07dceafcf065479a3c1da14b SHA-256: c0d29f35ab10c4ebc28e61111d66ee63d5c094d20cdee1165f7abe293b0822c8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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 https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/0b9451098bf1519c3a8bccf6684d642b/5596403634.pdf In PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085036b649e7---5645997182.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/vuxulu.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/80851679683.pdfIn PDF document text
    • http://brlairport.com/images/file/91043118784.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d304c111ff6---46651514615.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/mimojuxedaminar.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/zasora.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6c10dfe4c5c2324778df0e634435edf0/91053357496.pdfIn PDF document text
    • http://retailcop.ca/files/dakanidu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nipvvi49oirjgp679moj4leq25/wutabipukepemonigozekufem.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a955c58963---xobosasavarizuwinususefu.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/15842129595.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/15120741446.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/pupojavinapudifulas.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/41560415661.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/dipinixezexisoviwibo.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1708aea8---31936453984.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/rimunifabuvunabojatale.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5140cbc71---xelevek.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/dapowonosimobe.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/7p1mlhqf9itp78d0bovpu6lme0/puzuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=what+does+code+dc+mean+on+samsung+washing+machinePDF link annotation
    • 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_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 17616 bytes
SHA-256: a7ff8c877f60af5d66989ce5f0f44bfad3eeb3b209fb127af8b4c791f4138503
font_01_sfnt_off0001173e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F55 10848 bytes
SHA-256: 73c326ba0f8f49d40acfc26afdf8782b3c6e654794e22412a48f49d44de5f5b6