Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea790f7b60b1eb16…

MALICIOUS

PDF

84.5 KB Created: 2021-09-19 21:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 903943670e146f17e9c9864af40bab5a SHA-1: cf380e90d7ac5e2a3dd837020ebf93fe772c80f6 SHA-256: ea790f7b60b1eb1678229034e4103c8c4d9ffebeaddb2b5b96323abc2306c4fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links to compromised websites, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/eac8454130dbe52b16f72c337fabbce9/dogazifigudirobepuvu.pdf In PDF document text
    • http://hide-bo.com/img/tmp/file/sotujofuvo.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/16670637944.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/41167821920.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/11932752358.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/xuwola.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/65949269092.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/dosonedogodetope.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/xebazowepap.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/86996915221.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/loguxewewape.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/32962705938.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/xokux.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141140c57bf0---bufefibikokomoxif.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133caa9cc4d2---54910113297.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/tikugijonezoxuwuko.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/refozawojuluteri.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/77482072820.pdfIn PDF document text
    • http://tcihk.com/userfiles/vobunewi.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210904021336.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/wojuvilofabo.pdfIn PDF document text
    • https://tierlistei.ch/downloads/mevamoliwokezuj.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/19517764816.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/desomajumazevokuzer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=role+models+malayalam+movie+online+watch+freePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2C 18016 bytes
SHA-256: 94ba00b9817eed9753dcc14f208a0c7503344a5d68d413ae26de0b50c59bdb74
font_02_sfnt_off000129d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D6 11052 bytes
SHA-256: ee8fbde7f0b8f5bdf179a0b4d7d0195f6fcfe8084f773cf219e49f8a3944c731