Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd5bdd29dffbc23…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 06:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e8814352366c53ca3b4d087de50765e SHA-1: af8f68093358187c40a8f57eacb1aa6af8cc83a6 SHA-256: 0dd5bdd29dffbc238a42c4a957065283dfd7ec72d55054cc5e638218eb183a32
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1539 Steal or Harvest Credentials

This PDF document is classified as malicious, exhibiting characteristics of a phishing and credential harvesting attack. It contains lures that prompt users to recover secrets like private keys or backup codes, and also instructs them to copy and paste commands into their system's command line. The presence of multiple URLs pointing to potentially compromised WordPress sites suggests a distribution mechanism leveraging compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ketchas.ru/uplcv?utm_term=pscp+command+to+copy+file+from+windows+to+linux
    • http://robertoantoniz.com/resources/original/file/50408157381.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a164cc0382---vaninabogumexuzaxusunoro.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74huk42n1jgkhpv4vsb66fq365/35981086076.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbef25d2c---pavazaxekenaj.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/q4tsj87jn0ptke9ei7heu7c8bj/zerataje.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607828c65640c---18035746960.pdf
    • http://hchs1972.com/clients/2/2c/2cb73362227bcfbd3ed6ae01b5b3dc46/File/simab.pdf
    • https://stillwaiting.org/userfiles/file/72628643655.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/f0ca0df1c9efa20497a39c86362bb569/15519468986.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073d327d1480---nenamolubulomuliwa.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/80210136584.pdf
    • http://ks4073.com/file_media/file_image/file/nuxipizuti.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0e442994e224417ad790ad45490cf7b4/ruxapaniwogegubamedob.pdf
    • https://ltssinternational.com/res/wysiwyg/file/mupolaxedapozoxatipuzed.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/fphek972gimt7h8c5h8drbugjv/zelirajugejajuluvejuti.pdf
    • http://carrozzeriardue.it/userfiles/files/16948151127.pdf
    • https://mides.vn/images/ckeditor/files/bagomadedulozafadogelawug.pdf
    • https://angkortaxiservice.com/userfiles/file/silefizazotubed.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f39e4a5fe---24647981159.pdf
    • http://ecofincas.net/ckfinder/userfiles/files/watofanan.pdf
    • http://dorp.pl/userfiles/files/kufabazugakefevi.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160abdb8a6bf9a---mopom.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/famowosenur.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080ddb44c527---xabulokaterep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f339.bin
81e3e6da6c4386e3609a7d79cc82da1a589a2ebf70b7c8f1fee3cee3d7a0ae24
pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 18488 bytes
font_01_sfnt_off0001240e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1240E 16792 bytes
font_02_sfnt_off00013c25.bin
aa12855bc603b804bf807c265f1b5bdc0ea8d3a1fb260345f16564e52b2d5fc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C25 11184 bytes