Malicious PDF — malware analysis report

Static analysis result for SHA-256 8068123dd5bd724c…

MALICIOUS

PDF

70.3 KB Created: 2021-09-25 10:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b433362518554087d29b5c1b2cbe897a SHA-1: 9c405a9537a538816f176a720611ef10d0c89312 SHA-256: 8068123dd5bd724ca8520a9a2d1510b391c9b51ecf0a65f82047c258e11686a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a link related to 'pokemon games for android download apk' indicates a lure to download potentially unwanted or malicious software. While no scripts were directly extracted, the PDF structure and URL heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://studio70.eu/userfiles/files/57885867016.pdf In PDF document text
    • http://bhk-aindling.com/userfiles/files/renolodonadosoxutup.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/263163479.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202196112734.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/doxasolixuweropisat.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/21814470837.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/xepujegolesosozadadofej.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/tipemegamosenatagal.pdfIn PDF document text
    • http://client.diffuse.info/files/39920915491.pdfIn PDF document text
    • http://nguoiquangphianam.com/uploads/files/49792450741.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/jezerilowodulonab.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/94510660654.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/43988016876.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d125b801cc---towivexezodotukeduj.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/45003019477.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/98589857516.pdfIn PDF document text
    • http://getvisa.ru/images/File/12145370728.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/44196503800.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/73939362024.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210919_2C7ABDF91921B23A.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/pulezezatirevomufe.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/442a048b286ee4bfd2756bf8b804d0a9/nipasupukabimomitepo.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/27274388915.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2a3b486c582ad68d26c2cad8e03c668d/93430183572.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/gikolebivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pokemon+games+for+android+download+apkPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D6 16432 bytes
SHA-256: ff94f3b395184527db478b013250d8a9ddc759e16a3a8ce87e527554c1dfffbd
font_01_sfnt_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF265 10924 bytes
SHA-256: b867adcbe617b303e679a66765d1a412ca337c3e7dba2692fd4fed45104d5369

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