Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0366fa50b00cef…

MALICIOUS

PDF

73.0 KB Created: 2021-09-28 01:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 683702fe188ae36e4dcd0e845c52450d SHA-1: 06ef38136bdad248bc6856411811a36e073a2554 SHA-256: bc0366fa50b00cef5403134cf69377debe41faf82b5041edf29807fe54d32d61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ozcetinler.com/userfiles/file/99457752401.pdf In PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/36678880149.pdfIn PDF document text
    • http://zhuxintrading.com/uploads/ckfinder/files/20210928/16327724766064.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/nabatomozusaz.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/cf95858f4e1f04ef24937441564a943f/nanutosixojiwalujizanisu.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/91215917555.pdfIn PDF document text
    • http://email-database.info/userfiles/file/bilifolaxepuxorexenuw.pdfIn PDF document text
    • http://secoinblock.com/upload/files/71641851161.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/mereno.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/ridunegozapa.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/figidifaroruvusokasava.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/27263924621.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/4v9hpd20k03nergtd2uukgu8ol/49543799226.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/35251941207.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/32636047092.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614813589c35d---81238149336.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/batemevinigudewedalara.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/sokumemedovilaf.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/31038141112.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/20992cc911f3f4a6ff9eb5bd2e6a5721/31857958775.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/wosexozivegagifenukuzo.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/15841279565.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/gogazalofitozapivi.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/jagok.pdfIn PDF document text
    • https://ctyhoanongangiang.com/userfiles/file/mugexoki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=telechager+application+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_off0000b920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB920 10588 bytes
SHA-256: 32e88c653c1a1e371fddb93dfd797ef6ece9f14c0f3a18c48ab96538f8a90b6e
font_01_sfnt_off0000d104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 17624 bytes
SHA-256: e57ea69aac1634f60cc74b27f1954db1ef6a5f097fdb4cb2fdc704afd9771bc4