Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd60c5f2dc079b6f…

MALICIOUS

PDF

74.2 KB Created: 2021-09-08 14:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f7b5709de4331b09a0f738dee714d25b SHA-1: 2d6642d236910b01ded15fb0544fa5ed21e217c3 SHA-256: fd60c5f2dc079b6ff4a05e8332e5212480cc6662d47ff59f0c38ca465a6e7b61
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by indicating a link farm on disposable hosting, a common tactic for evading detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mosallaesf.ir/uploads/ck/files/sotufilogikegezun.pdf In PDF document text
    • http://assotechne.eu/userfiles/files/jarise.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/forekixebab.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/49407004143.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/kukomi.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/50820090590.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/37294457695.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/18350101654.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb374034f3---wonabubabawafibutumivup.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/8960380137.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/94404812305.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/33738273372.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/fawalab.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/38275820462.pdfIn PDF document text
    • http://thehouseproduction.net/file/lajabebutixozade.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/54372325380.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/zozokavubagiluvim.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/1751606622.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/76986042977.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/wojapiraturefigixogob.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16137eb8d5c9d0---65638875711.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/26521452539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=imagine+dragons+natural+piano+sheet+music+pdfPDF 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_off0000bd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7F 11120 bytes
SHA-256: 4724c1002e5b15a086f2e8991995dc78afcfee062369f6f76eb75fd05df6bc72
font_01_sfnt_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 17100 bytes
SHA-256: 5922de03f3b75e423eefafd5832361900d4ca068497ff653e47bff35b54937de
font_02_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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