Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd569f6bfa2a0fd…

MALICIOUS

PDF

81.8 KB Created: 2021-08-21 22:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: bd60517620c1e6941c51adcfd8eeb228 SHA-1: 70b777bcc2065a75a16ad9d128da4754059cf0cf SHA-256: bcd569f6bfa2a0fd62b7bf4725873361f13f4c51c19b788601078e90c2199397
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to domains that appear to be compromised or disposable hosting, consistent with a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/4e3ba4df9887d7137683ea94dae36a60/81012849732.pdf In PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/tvlabdpo453qca019lo7st96i4/19348284214.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d0fed56e9---pefomir.pdfIn PDF document text
    • http://banghenails.com/upload/file/53606456017.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/0fdfa56e27011ea1b263c25ae91b0186/24893416002.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-15/20210515120149942486.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/81951586589.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/daveledixarawotazasit.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a358493054---10981127414.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fccbc7739ea---25416848846.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/bejimuvebarogajo.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/591c59964fb5ea4ca0efefbc83975e67/17487723707.pdfIn PDF document text
    • http://eksternest.be/images/file/92560320813.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706c65a8627---rexuze.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/167889754.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/kumulaxinefezezi.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/vepudowizirinawubax.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/sawiva.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b34cb6766f---85668481368.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/kijerixujuwufidafa.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/zunurikudadi.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/edc5464f03f6b0b04ae18acceeec3453/88363224960.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/zefefesinasugenoninexog.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/b5eaf71ede3366ac348152579fb88b6c/betexegugolalurimuja.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/sugolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+is+the+cookie+clicker+cheat+codePDF 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_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 10448 bytes
SHA-256: 86e8aa7288990971bef1f2ccaed1212ec535b00d0d4319a816e3b0be93c12215
font_02_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 16308 bytes
SHA-256: 35d7d581f846b102ae12a139d6902389b89c0407ca414c131a14535441bb970b

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