Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5730ac2ece676ec…

MALICIOUS

PDF

74.2 KB Created: 2021-09-16 06:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7c962d5b7847d0971961aa91346948f9 SHA-1: 5ebc1ce24fe2c264088ee6069ccec22d05624a8f SHA-256: e5730ac2ece676eca8fc40606e53d244f11bae85d2b23d4fe1c0d30f362a0183
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. The primary lure appears to be related to downloading software, as indicated by the URL parameters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=download+stick+squad+sniper+battlegrounds+mod+apk PDF link annotation
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/38c154d73f0f162b7e035e0f00f8e79a/derasopiwepedire.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109020803344136.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/riboba.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/xaxewavazodativeleb.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/nawesuxofogidaxuj.pdfIn PDF document text
    • http://greenglobepms.com/uploads/22376833556.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/sasopila.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/61667257718.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f942413514---71121384631.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/vovuzoluxomimomasazapen.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/gagupeselifeguvilow.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///tatuvosotaru.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/32708551813.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/34480513683.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/jedojumubosabuse.pdfIn PDF document text
    • http://labonscafe.com/userfiles/57539478873.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161316221d4815---79931487453.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/lujosuponis.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/31590647236.pdfIn PDF document text
    • https://tsegypt.com/file/85546618486.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/20219121732541483.pdfIn PDF document text
    • https://titishop.co/upload/files/muvevil.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/41dd693aac12b31ca2018434cfbda131/29289020949.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/q43b597bj7gf96e0aisnaf4mtb/84356941655.pdfIn 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://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_off0000babf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 17688 bytes
SHA-256: 2f3c37421c4671e4f716d9ae4e0f4e207f1c8c8141855b603b64a275589cbd93
font_02_sfnt_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 11424 bytes
SHA-256: 57f77711bf25aac2aa5dd3ac5b1652bbbf8ddce1c4080cacda767180b279d1d9

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