Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b927b75a7d6de9…

MALICIOUS

PDF

89.1 KB Created: 2021-07-31 17:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b829c12d9b1d8c1e192d2f5c21f82634 SHA-1: c4bced62b257b7232c3fc421b28ac3b969036ef1 SHA-256: b7b927b75a7d6de974d32538e478fb94cd285ad1b9a6ad99feb77715c90721e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised WordPress sites, suggesting a link farm or distribution point for malicious content. The presence of multiple distinct hosts and a high number of PDF links indicates a coordinated effort to manipulate search engine results or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19d6da6528---guzawefozurifipiwemirag.pdf In PDF document text
    • http://anhbanglaw.com/userfiles/file/61574424372.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/6660856094.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/89129043676.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be3b6627a6b---dumofosezolibonag.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/zujewosakelaxodoxijojoj.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b49821716---28674184359.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/sifutirikekunotifanavada.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/beluzipanomowa.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/batizujajo.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c591e18e4b728fbfad35d7af1aa1876c/ginulugerukijukalaj.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/duralekadavoz.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/24318997052.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/vakaravakojaw.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/11690903542.pdfIn PDF document text
    • https://kildevangen.dk/files/pivadizowudupavaz.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/021580b37e5bb5f9b77cedb9f5e0548f/kafezufufekijetako.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65876485004.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/kazumenizizinipase.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4affd91f3ac2ca081510d1ea6f73a412/xuzegegotetatewejaj.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849e808da77---81062407631.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/poredusitupiruwosomin.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/11251909669.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/3836323219.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/kixuvajawuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+much+does+it+cost+to+install+a+prepaid+electricity+meter+in+south+africaPDF 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_off0000f3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D1 18176 bytes
SHA-256: 05d4dac11209b12cb421147311922389f8f84c851d723f398a354f5da5a79926
font_01_sfnt_off00012398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12398 11176 bytes
SHA-256: 00545e72cd5812a0b72d54e70fa970b4f2fc1a37159ac15a017bed3df87ae0c2
font_02_sfnt_off00013d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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