Malicious PDF — malware analysis report

Static analysis result for SHA-256 586cec47ac8db723…

MALICIOUS

PDF

398.1 KB Created: 2021-07-02 15:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f982742a288a33bb17fd434e18ddcafe SHA-1: 5cec1eddbe175761fad90fb530d7d4a9364dfec0 SHA-256: 586cec47ac8db72324ee2927f30e42eb25f07f28a4a9c351ffcc2410ed9cea46
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URI heuristics point towards a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9375

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://citywideok.com/clients/75789/File/lifazoxuzat.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cd0f7c243e8bd521659a7dbce5c677fd/42254388485.pdf
    • http://marta-galan.com/files/varios/file/39711071764.pdf
    • http://lab4050.com/upload/editor/file/3219905914.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160764e16bff0e---lapirejigudekasape.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b349a9ba5c2---42259253986.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609075cf21d16---xisoluxujexasodana.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77c86c52b9---gibedakikuxudakidimaropoz.pdf
    • https://caribemed.com/userfiles/file/69835575655.pdf
    • http://fixafilm.se/userfiles/file/viwizafapijomazido.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8040fe34---79302959896.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5690be3cf---kemuzituzosisov.pdf
    • http://susasoft.com/upload/userfiles/files/lazedutir.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a9f4024a498810a54e8bcbdc8f7f0cbc/14953029757.pdf
    • http://adams-gold.ru/archive/image/file/gumizafitidanofirab.pdf
    • http://vivaibonomo.it/userfiles/files/94393183808.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/fd40f84efbc2186d99fce70813356626/30843578140.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/suxegamo.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/a0v0ghp907b19icapglkha5lra/10515762164.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d56838ed44---vulosur.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8b828e542---rufuw.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/dc2fe64ad9c5e59a9286f7034dd3ac57/beganidafibinugitexofobix.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=local+sweet+shops
    • 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_off0005c102.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C102 16792 bytes
font_01_sfnt_off0005d919.bin
68748416392b41446d6deb37c6845b05d99045d0b6e2d3b386538734e0ccb85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D919 10216 bytes
font_02_sfnt_off0005f047.bin
fb666109c4d1af8468c3c64cad6653b68c1b918d25f6e55377241995a77f63dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F047 22200 bytes