Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c64ce0f1fe65976…

MALICIOUS

PDF

74.4 KB Created: 2021-09-05 21:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0bc45d8883098433603129fa2d8403a SHA-1: d49dd51e598fc1b13ccf9f13605af1b8ffae6d42 SHA-256: 5c64ce0f1fe659766a6a0d51781c6f7329fbf2626abd2f7ce738e1c6e3759a9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gegeny.hu/uploads/file/teworadabikiv.pdf
    • http://tavaszitura.eu/userfiles/files/45549706637.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/r59e43dbnmnrhrg47rr34050fg/fageravafiraforug.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609822a12de4f---nijelategiwowu.pdf
    • http://brezov-gaj.si/uporabnik/file/kumesuza.pdf
    • https://airflow-skateboards.com/upload/file/divon.pdf
    • https://xn--mietkndigungsrecht-best-gpc.de/userfiles/file/guxilo.pdf
    • https://dalycity.com/wysiwygfiles/file/tajowigilozezof.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/sgk4o0qt70tv6h4h07ea57m563/62889854643.pdf
    • http://toptoptraining.ru/img/upload/file/ropiwitajopekuwikujum.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6396eda68---xigufipes.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba38001157d---rogusizaxatedo.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a7f0f7435a511701ff6e9061180260c2/37980409920.pdf
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/8926299151.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0efab2d1836b92f44fee2366d23ebb09/31818576650.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/74381382862.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/dec64d0f844d7c8d247638c625bc6977/91841675642.pdf
    • http://aps-mes.com/files/file/wepirufe.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1f610608c2e037485bf8dd97ec939d83/3905973313.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611189c2d58fc---zazixasipaxunevifufunixin.pdf
    • http://ampletrekking.com/userfiles/file/53871402542.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a28cca623a3---bibaduxakeforomugutad.pdf
    • http://gillsandgeckos.com/userfiles/file/zimetezalakapegi.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/beb2155a92ead14673ca20b17dc3e742/gatolenuporizeji.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=labnet+c1301+manual
    • 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_off0000c249.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC249 16792 bytes
font_01_sfnt_off0000da60.bin
ca77dc670eae1dff27ad3bd986d6dec934997732fd7a3ec15fdd2d2d14709168
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 10452 bytes
font_02_sfnt_off0000f230.bin
cf44ee13781f4858aa90478d5df2526081fb89ac8b034c6745527745bb7f8aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF230 16140 bytes