Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd3c5711b030bf7…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 01:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c89b405ab2b019c73750147aadf27f6a SHA-1: aef75fcffbfb253dc0a2223f94362f9ded03d74c SHA-256: 5cd3c5711b030bf7b3912013e06ca6bd31926f7e3cb45dc81d3698f15f211aea
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a high number of embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wastran.ru/uplcv?utm_term=cara+membobol+password+wifi+dengan+hp+android+tanpa+root PDF link annotation
    • http://exim5.hu/_user/file/zolupe.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/sijajefuleloxowumevalu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613005cbc66b2---87198026178.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/20527374772.pdfIn PDF document text
    • http://zuche0551.com/upload/file/wowezuzijutasibezomur.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210906115614.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/jexaj.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/xiwuwudamawojuguta.pdfIn PDF document text
    • https://windsbs.biz/files/file/zozagoxomobabum.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rewofojozunasududinul.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/63740990628.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/wisimavisorifojedixev.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/wanotadulakir.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/rpdk7ei1ub473kn2vr9e7fpq39/48104463554.pdfIn PDF document text
    • http://lejonhund.com/upload/riribumezevubofa.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/86096378999.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/23180046174.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/sonug.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/kufefuvif.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/18217746146.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/feraposunomuxi.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/79065381109.pdfIn PDF document text
    • 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_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 11204 bytes
SHA-256: 9fde242fce18792ed9e93e28a85774b6dd580c0370d37420bb5ae8e645129b5b
font_02_sfnt_off0001099f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099F 18836 bytes
SHA-256: 9bfc031699ad0ce0b810d6e96ba3a1df79387ec087f78e6a4c2e587f7e0e3e5a

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