Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edd0336a8d14378…

MALICIOUS

PDF

93.5 KB Created: 2021-08-02 09:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: eaf573491f7c7290a6ac4d51a0bedc1d SHA-1: f50df26d4e5f374d9612d8fb5a5ee4b70bb2d516 SHA-256: 4edd0336a8d143785492dc04afd2085b9570add3c1338ac6d8d0162ad565c4bf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting. This suggests the PDF is acting as a lure, likely for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://zatacorp.com/upload/files/77560282373.pdf In PDF document text
    • http://angarakshaksecurity.com/userfiles/file/27315811156.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/88283961949.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dd93327fced---sopabuniwupugakusijesenu.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/96f33c86bcb937831749d9295f9c0ddf/fawanoduzeniwoxoboko.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/4b3ab2761bcbbc4732bf8cceb8046abe/28356361723.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1d397ce0---jukazudapufe.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/t39hmhdb579u0ettcpadertina/jegedevagimukizuwis.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48678015788.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/84572054271.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608068d76f2c7---lixesanoratefepuda.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc2bfb92de---kitozapoziwakaxi.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/kirunozenuvizonekidoz.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f67c841b09254f9f26be828e16ebef4c/28277756311.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cccf136a16---87163741141.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/12928121186.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc418e92ee---mafegatun.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/gusiridopugi.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/jowovukupak.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/22143337790.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/77331123275.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c909e023fe7---sorenamorunofuni.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/83240909900.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608056cea98a3---96471612022.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/08ada9sm5kgrkaddkdn6k2mm2j/28389688397.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f5bf7fb10d1203ab9002a3d06339a3e9/bogufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dhoom+3+kamli+mp3+song+pagalworldPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 17152 bytes
SHA-256: 47aed22691bfce5a5a19cc017b6db325a2b47ee867afbe3eb4456e2b6c801398
font_01_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 10960 bytes
SHA-256: 87d1afad906c6104072bb799d72847b69fe0617a722840370227b2eb20cfb4dc
font_02_sfnt_off00011944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11944 21312 bytes
SHA-256: 8582fa24b39fb64f73b84bfaf822f37cb8f3713ea909be406be5fd4468703b55
font_03_sfnt_off00014f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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