Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c419ed50903da7…

MALICIOUS

PDF

87.6 KB Created: 2021-07-22 15:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4d844087c02118757592aa1ecce99da7 SHA-1: 2cf237135cde553404381d6bb28597c649138da3 SHA-256: 47c419ed50903da7e420a5d8958cc0fcacbc6d1eece85cab5744afcfb5680034
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm that directs users to various websites, some of which are hosted on compromised CMS uploads, indicating a phishing or redirection attempt. No scripts were extracted, but the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092e9e5ef054---34661045792.pdf In PDF document text
    • https://299-45.com/CKEdit/upload/files/19348886844.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/58499796759.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-5/20210505082130442320.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/ledexokozufisolimeburi.pdfIn PDF document text
    • http://allycatering.com/userfiles/26881082031.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607088593ce9f---koroseduwulilubupaniz.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/tuwowi.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/jiwenokunifir.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad89c36e5f3---21656708184.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/21841171695.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607aee0824b7b---7949102718.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/21616828623.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/b2il7cp3b0r9v46o0vfc445ecm/zifimurelupafi.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6713fb72---sikakibokijuxe.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/29824865232.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/203f218bf8d4c5259fe3254e1e24684b/15494518216.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/14764120928.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/fm6u1albchcahukfda4fi5vjkm/bujevogixekexesoku.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/2qcjg1j9qvb2ekk0bqstmvf8hv/85136333169.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609407cace267---tutome.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5cad46ac---41155884731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=types+of+etiologyPDF 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_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 10244 bytes
SHA-256: b51ed7551eb6e51d3f8b5fd88e4d0b75e9c71a6691a8319e0b6a3406734e6a5c
font_01_sfnt_off00010ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCD 16608 bytes
SHA-256: e93767680406f7125e9c458860210f9ce4720264bfa756411b53034aa257a8c7
font_02_sfnt_off000137c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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