Malicious PDF — malware analysis report

Static analysis result for SHA-256 c160413215a9953c…

MALICIOUS

PDF

85.6 KB Created: 2021-07-18 17:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f810e6f048c6083cfa1eac767a40247d SHA-1: 4f30a162b38da55fb1516e3bb6266eedb2e7f935 SHA-256: c160413215a9953c27d8db185406cd7689345b60ec2e9eb243cdc83df1a93095
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution.

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://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c34fc21ac17c0705122b8e17df62c0a9/40263521283.pdf In PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gkipur9vme9a0h0llilsajduc8/limafagonuxiteferod.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/edecaf9d0059669bbeaaaefc650c7236/11128569510.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/4add6df85edff9413e4c337573e63a19/39326259255.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/naboseruxoxapoxeba.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/quvgjhbf1m5gtugpma6vqppknn/jubopabuwiwekujirit.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/514870e1cc4859d882d0f10ad12b6a35/dupamuxupaw.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f9e22b5e22e5728131cabaa45387d8e4/47825436718.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/mulawe.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f3f6750cf---nowunoteborozunilix.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/58599791372.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/fef3cf09ba0786fbbda5b1cb8059a38f/2201446762.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa59238a2d---26053662368.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607606717b8ed---kofitiwekuvilofes.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/8910c1f8509a5cc99f0411e7e22242b6/vaxikiliziwememozofeso.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/89611769984.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3e16c97913d4c7ea6319c52dafae57c6/mukivepipepozolevotos.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/264537fa207337180482107fefde24fc/xarorezexebezuni.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94582472054.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/51451968954.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d65862d97---tizuvafezumem.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e90eb0873---mesefokujudekibozaputixo.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/gefukuvewurififanum.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/26128095609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=homemade+pie+crust+for+apple+piePDF 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_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 10768 bytes
SHA-256: fd3fcd06e4e352a9151a30d75f54b5e700ac2a9ac4661b17e006a6bc038aca64
font_01_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 17236 bytes
SHA-256: 25d794641b79df4cf5899839bf43db24597387fc93747fc461e261254ea898e4
font_02_sfnt_off000130f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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