Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72a06049e9bc81d…

MALICIOUS

PDF

78.1 KB Created: 2021-07-03 12:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3468c6f7d0fa8a8d7ed10b9f64c12d9 SHA-1: 24396998654948e720351f824a6d71f1ab687338 SHA-256: d72a06049e9bc81de84b6e1f9742f02d7fcc79c873b79115b53b8dab5c73355b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised websites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm nature are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/41da61af15d358908b355a7a60c2ab4e/xudadunujopezonadef.pdf
    • http://minerva-collection.net/files/files/wokipusuwigozaxezev.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/98d0895dc81f7819f8cc6a1e228f7394/42160735736.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093c3318eee6---63645627252.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/nuniwesewurejosomoxeger.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/597c56b3d0df048b013be3d8e561b105/derokisudekupi.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc205924b94---43930126557.pdf
    • http://mikailang.net/userfiles/file/20210514093356_1290218466.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbaeda3626---julovijixibisob.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/2c315cbb42fe5d2644f3560088632a28/donawedulebegunok.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a25241bb7f2---jinarifelogabixunezu.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088acbf7a4d4---13734974565.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/143654a03654cb289755ab9491c516e2/rumeduganeti.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/dohdm3pvij8458mbjcubocs8ko/vewakitaz.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb75c845a63---nodotaf.pdf
    • http://immobilieninvestors.eu/userfiles/file/bumugugibigupi.pdf
    • https://hoalavender.net/upload/files/julozewupixatopiw.pdf
    • http://www.alfapilates.pl/upload/file/wobikakotigo.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f0380ae27---vifumatewulibimesufoguli.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61e2f7e34d---9148538971.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/e46655mpk44obicqh2tgtt5r4p/subagekopegixudelum.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573dd7e812---zemozor.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/96d399b6b155ff55c49f64aa45cc5da2/39810830563.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090b39f8586f---27360679029.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/s9cj9phvovl023p4a28vh65gm2/41982624686.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=an+introduction+to+applied+linguistics
    • 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_off0000cb84.bin
b4690918c8f32292c8301ddda47db06de1586b98eb86f8301dae43f36b5ac6cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB84 17740 bytes
font_01_sfnt_off0000f9da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 16792 bytes
font_02_sfnt_off000111f1.bin
6c82d34d270fbe9f1c3260c8561447b852c473bff5454af9a19f45e6b0611e01
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F1 10768 bytes