Malicious PDF — malware analysis report

Static analysis result for SHA-256 912b6fc94e4e289e…

MALICIOUS

PDF

79.7 KB Created: 2021-08-01 21:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1a2aa57b59df0b9a068908ee64c64d12 SHA-1: becd1fef9041314183a708dbe44a927b8cff5f6b SHA-256: 912b6fc94e4e289eb1f018c39189f5acfbd28ad0b901b70384d3438644c89dab
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to various PDF downloads, some of which are hosted on compromised WordPress sites. The presence of a 'Password-protected archive lure' heuristic indicates the document likely instructs users to open a password-protected archive, a common tactic to evade gateway scanning. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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://queure.ru/uplcv?utm_term=interchange+5th+edition+level+1+student+book+pdf+free+download PDF link annotation
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/cb0d802d04637852c56f2b0726cf0e90/lejewi.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/95452379484.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2174ee3bc6---57335276374.pdfIn PDF document text
    • http://pcwest1980.com/clients/9/9b/9b13e9c1eb96aaf026ead536bb80a376/File/lijaralaxuburowivapinegam.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/00cc22c1c24b9c920a4264db5c77ae2d/49201444682.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/zatoti.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/13653840064.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607638525297c---rurajafoxera.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/40adee2644f9a025e2e17463ea063fa5/63574419365.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/8b822fcb10d1368258724eac01aa82cd/22449022304.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/4706965077.pdfIn PDF document text
    • http://jarosi.hu/files/file/18866405584.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/bujatidanavukavuko.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e31bfa8ba5a---vomovusopogasetigeba.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/275826740.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/85588213645.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073762c47141---vevuwalobevatowonigovivoz.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/niwunujo.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/girolusonofobebamu.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/87542099572.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/29353056875.pdfIn PDF document text
    • https://samowar.me/upload/file/muledubazogatar.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/95043316218.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/pakorax.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDC 18208 bytes
SHA-256: 0f32c8ecf421072c73f9184d06c13de9350f3bf23a39fb4b2b5f775db2f653f6
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001151a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 11520 bytes
SHA-256: 3070bae9a96d15a9e89678734f8c352ee0b6c4fe7651f0a2caa45db94d95be28

Open this report in the interactive analyzer, or submit your own file for analysis.