Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cf17455b19390c…

MALICIOUS

PDF

80.2 KB Created: 2021-06-29 05:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c17dfb81633f1aaa53221fef66252df8 SHA-1: ec7719e52ce7d3af4bd3845c8fafd6354bd04b53 SHA-256: 17cf17455b19390c017e1b846ce6b93ccbd7f88f98b9ca1f7b4e95511fced975
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, likely attempting to trick users into clicking on embedded links. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious content. The ML classifier strongly flagged this PDF, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://coretry.ru/uplcv?utm_term=lady+may+yacht
    • https://jodhpurtravels.com/nbloom/fckuploads/file/8903311952.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/fd48596ce46b586434619367502cb332/fubuluwavenawubizelexud.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9a1f7f3f0---jikozesudavejarudal.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160ce94ba1947a---gupoxasuredelovitaf.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/a5dd23c7d923762975786281435cfbc8/wuripemamijitol.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca8369e7710cb202df51720d603b3f28/20714561495.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/95272630973.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608199e3ce96a---pakadisexita.pdf
    • http://jgbt.us/pds/userfiles/files/34864277107.pdf
    • https://latework.cz/soubory/degironijofigapapuwuro.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba741d3984f---84384929148.pdf
    • http://maristaslardero.es/userfiles/file/56895573715.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b8b6f24f4---49234814609.pdf
    • http://ajivikafinance.com/userfiles/file/risafixak.pdf
    • https://iamtimeshare.com/userfiles/file/dalujagasigekazu.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948f79a477b---11853911729.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3b05e8db---votokolisibejuzugalox.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6a6845533519b7d3a32806a435de40f9/27499670671.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/futis.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/82718077953.pdf
    • http://ithalattagarantibelgesi.com/resimlerfiles/73498716295.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da52e3d592f---kurox.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/25d8d06c45d0a5b02ead490c2fad09c6/81190245000.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_off0000d757.bin
7e777b9f17b98e6196688258e78dc054299b99a842b07344ff508e03292ec284
pdf-font-stream PDF embedded font (sfnt) at offset 0xD757 9944 bytes
font_01_sfnt_off0000ed54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 16792 bytes
font_02_sfnt_off00010566.bin
8b16ebe7a0a2a80473516f5bad36fd356eb16b80f5ffe94758187216f18c1be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 17588 bytes