Malicious PDF — malware analysis report

Static analysis result for SHA-256 01794051f272219a…

MALICIOUS

PDF

71.2 KB Created: 2021-03-06 10:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbfbbec67e2500ecb96850fd00ed677a SHA-1: 2328e29f5340a0623da9e0f4f1c84dd94bc6406c SHA-256: 01794051f272219ad942c25402b12a2bb89d67903c0608b318e28232ca786d8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to PDF files hosted on file-sharing services, suggesting a link farm for SEO poisoning or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs likely lead to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=soundcraft+ui12+firmware+update
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/30a3baabf19b1.pdf
    • https://cdn.sqhk.co/lewulula/ieA8CfV/70400059236.pdf
    • https://cdn.sqhk.co/riraxizilob/aw8nLjj/krome_studios_bandra.pdf
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/kevoferer-vijezigoxon.pdf
    • http://setovewurepenu.22web.org/rewipukuzale.pdf
    • https://cdn.sqhk.co/dikulodut/cvhjCRW/wodenomovunaxi.pdf
    • https://cdn.sqhk.co/fabunavaxa/WCiemD7/dizapubedaja.pdf
    • https://cdn.sqhk.co/wapiwogemi/fgeggse/merriam_webster_dictionary_download.pdf
    • https://cdn.sqhk.co/fapewakuw/cFZZibX/91904945177.pdf
    • https://benezome.weebly.com/uploads/1/3/5/4/135400217/tijajisumawalukigazi.pdf
    • https://papuwupiruji.weebly.com/uploads/1/3/4/3/134348025/03e8a5f54fbe.pdf
    • https://cdn.sqhk.co/repudodo/J5jhPig/zip_code_us_72401.pdf
    • https://cdn.sqhk.co/kagaxavog/RmLSgcF/best_friend_forever_ilocano_song_lyrics.pdf
    • http://nokutanebufevon.iblogger.org/department_of_health_palliative_care_guidelines.pdf
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/ad6e9da.pdf
    • https://cdn.sqhk.co/sugefixa/flUmdif/rixutosifivuzebalulenav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mamesejo.epizy.com/bmw_x4_2016_manual.pdf
    • http://tujevudaxuxos.epizy.com/fl_studio_mobile_hack_download_ios.pdf
    • https://uploads.strikinglycdn.com/files/7b6de620-91cf-40a4-96f5-e2d5494a6f86/lg_g2_price_in_bangladesh.pdf
    • https://uploads.strikinglycdn.com/files/d3578fe1-3169-451e-a65c-cc3c6b353491/mastering_data_structures__algorithms_using_c_and_c_free_coupon.pdf
    • http://jiwoxofor.rf.gd/behringer_deepmind_12_desktop_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d95a.bin
dfde8846e141f5335a0b40ca6fcc4a706c1b57897bcf495c8951af25cae9a658		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 5472 bytes
font_01_sfnt_off0000ebfb.bin
e31bcb69170f70b56f3454c37a06b623da8297041b5797700fc159c044b8502d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 10424 bytes

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