Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fd9dc0fc578c09…

MALICIOUS

PDF

67.2 KB Created: 2020-03-08 04:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b2a2b4cc069f1c8b883a3f5b39333deb SHA-1: da3b89053ed681e51047bf652588106a17cf30b0 SHA-256: e2fd9dc0fc578c09ec971ccd311c28ee41fe07d0b226c4ab54ed6501b65989ec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, and PDF_ACTION_PARSER_EVASION suggests attempts to evade detection. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are likely part of this link farm, aiming to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ns2.pleasingfood.com/uploads/1/3/0/5/130541402/130541402.html#marsupials+adaptive+radiation PDF link annotation
    • http://neurolytics.net/uploads/1/3/0/2/130273610/jutigozaxivono-jesopakuwut-tojozijufani-laloxuv.pdfIn PDF document text
    • http://betterwithcontxt.com/uploads/1/3/0/2/130287883/1707519.pdfIn PDF document text
    • http://prestonrealtyllc.com/uploads/1/3/0/6/130604902/josar.pdfIn PDF document text
    • http://alsboutique.shop/uploads/1/3/0/8/130813416/zegebegipogez.pdfIn PDF document text
    • http://torontowineevents.com/uploads/1/3/0/5/130539034/wenak-wajeji-sififajog.pdfIn PDF document text
    • http://modemarketingsolutions.com/uploads/1/3/0/4/130436089/turimowomufik_xatapopimuloxo_miwemusol_xirex.pdfIn PDF document text
    • http://microsoft-office-365.online/uploads/1/3/0/3/130313383/af269fb7849346.pdfIn PDF document text
    • http://carmendaughertyphotography.com/uploads/1/3/0/6/130639975/soripufaf.pdfIn PDF document text
    • http://csgocave.net/uploads/1/3/0/6/130620366/1c3ae82a2c84345.pdfIn PDF document text
    • http://krugmanwasright.com/uploads/1/3/0/3/130313314/8345876.pdfIn PDF document text
    • http://orthomfg.com/uploads/1/3/0/6/130603959/jegoraximak.pdfIn PDF document text
    • http://danielrinaldi.com/uploads/1/3/0/6/130604281/4e22d2ec9.pdfIn PDF document text
    • http://www.modernalchemydesign.com/uploads/1/3/0/6/130639929/jakekuxonu-baduburi-rupoko.pdfIn PDF document text
    • http://millerignitesllc.com/uploads/1/3/0/6/130621873/7866236.pdfIn PDF document text
    • http://it-computing.net/uploads/1/3/0/7/130775201/dotogaxe_nused.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 9072 bytes
SHA-256: 21ab84b6864beab4739dd984c6ef3d0f83d2a6eecb71681d7d941b35737c1493
font_01_sfnt_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 16068 bytes
SHA-256: 7452b6b49b2d67df973eecb7580c7a2fe344bf55d7b957b3ade50b6969c50269

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