Malicious PDF — malware analysis report

Static analysis result for SHA-256 206380ac78767592…

MALICIOUS

PDF

110.8 KB Created: 2021-09-01 22:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 69fb9e9769f7c901a511dec54beac711 SHA-1: ee48820314a9aa8c7b9168939a13aa20ea2b685f SHA-256: 206380ac787675928bba7743ef9e7dd53d4ddc54d3689c8e7015ad3312cc1be4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pusancard.com/userData/board/file/9569162919.pdf In PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/30241447832.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/44990089605.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/bimak.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d6ba97bc0b69f9688611c3eb6893baa6/33816106803.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/eaca600993e906a8795aa70eeeab9689/gepixajadejobobutax.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/bakitivenisaxo.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/xamitowevolomedesubew.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607880940f4d4---18235738212.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82d894eaf---49987142405.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/pitesejedesa.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/48560903717.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/vezisabegabaxegorarumi.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/dipokajewuja.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a418a45f1a13ad89024a4eda7ee36a19/supixi.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6095ef0ebac2a91feb0742d6eab75d41/kasumufevuborelogaromiwip.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b4649035---nutatagukowekefodozomu.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/28594406645.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/13d6ea0fe19cc94edf013cf3eff4b404/dadexezinureda.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1270fb8e3c---nevejepazaf.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/12219858355.pdfIn PDF document text
    • https://activepymes.com/pub/file/55195695891.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1625614448.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/c60128ac2faa8f6e4bfecc5718e59a9c/kuduvizosi.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/nusebipifuzonoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=euro+currency+notesPDF 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_off000142e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF8 22848 bytes
SHA-256: 2a24d2b642b2adb58330abe9f10330ec2ebfbcb62fd637c70912e99ec3d940db
font_02_sfnt_off00019629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19629 10120 bytes
SHA-256: b6c139c9880af3b371cfecd96d36b4e99535345377915adf77d6f95660cd43fb