Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be79730240f3a5e…

MALICIOUS

PDF

102.4 KB Created: 2021-06-22 12:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d622a7314e1ac9b4410a90c3d9d25a89 SHA-1: cdc5d37bfa21fcc8930ea294824de464721d4866 SHA-256: 9be79730240f3a5e394e130b33290c514882b3019d3f1286c22b4642dbccb3bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, disguised as a download for 'Age of Empires 2'. This suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://chcial.ru/uplcv?utm_term=age+of+empires+2+full+game+download PDF link annotation
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b763a082761ec71863cfc3e580428cd2/wemajafafo.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/7b86e8fabba3f47f26dc279869fff721/61903147550.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a594953a7aa---76406254685.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/0cc9c009b5483595d1ef75899534b556/15187342495.pdfIn PDF document text
    • http://berbun.com/user_img/file/lirudavizizuxilakudad.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/13792f4e424857cedc97079b5eb18e21/gagagadukinefumoviluro.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a39cbdc94---viwez.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7c4e3abed06513bac418b0263f390b09/78793374555.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/44484514558.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/kfmqfsg0932597phfm37q788jh/bujevubiko.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/fokujomedubu.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/kagedivedakano.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/2413571565.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8980022146---fowutukobekofafubezonaji.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/dc53fbc249874b6d8fc7c28ced2a3fff/42134940259.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/fulesojebizolujosojeli.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/62613465db50e6453765dd03e8886153/10813133601.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609718004cd21---vesiparisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA0 5572 bytes
SHA-256: c17d9b789887be7604d7f73111332e5ef02a6b993d8acaad955c37efdf4f829b
font_01_sfnt_off00014e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E97 12688 bytes
SHA-256: 55d2268778d58f1865fcc13d0d8c918b38d2200aedbe74f153b18a1061afa4a6
font_02_sfnt_off000176e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E9 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

Open this report in the interactive analyzer, or submit your own file for analysis.