Malicious PDF — malware analysis report

Static analysis result for SHA-256 847833f416dd6f63…

MALICIOUS

PDF

74.0 KB Created: 2021-09-29 12:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2ac92e88677b70b5ba1b1fcf756fb73c SHA-1: 5aef282439f8e1b4e049f38aed7e5735b29976a3 SHA-256: 847833f416dd6f634cfba6591822b99ff5b29006e68f865e7a1f8beeb83a9427
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, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The presence of a 'download friday night funkin android' UTM parameter suggests a lure to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://fence-alarm.com/userfiles/files/goxotowisikizepa.pdf In PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/61188775058.pdfIn PDF document text
    • http://artediapharma.com/upload/files/mazapofumigiripelobobom.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/lupagomuf.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/6582806489.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/35933992887.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210911_7D167584135B2F34.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/65664981888.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/9134730752.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/sixenozegadifitajuwisupul.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/wixarisarafomogej.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/0f4529745ccf7ca1a4ee422e4366fa4a/furanirixopegejil.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ae7066c938591339e4517999d1132122/fapexudo.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/81049205685.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/4e1694e3ed85f40d337cec26d8646889/27770512440.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/35606570796.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/45523400959.pdfIn PDF document text
    • http://greenflameenergy.com/userfiles/file/winokajuzanekegiwu.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/44156073652.pdfIn PDF document text
    • https://www.colegiumaniucarei.ro/ckfinder/userfiles/files/35481096953.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/89029445005.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138f1c3de854---wovoseferele.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/91970593510.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/duvarokatipukesaze.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba1528889b---77124454632.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/nuwev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+friday+night+funkin+androidPDF 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_off0000b6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FA 20200 bytes
SHA-256: 6123c577a4dab34f1300ba7cd290c9a13c84ddd79963f769c7b6c2ae906ab22e
font_01_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FF 10728 bytes
SHA-256: 146a2f43c470abb3ef4beb6c7d40b99708c0c1f5a37f3f2e76a155dc5d133fea