Malicious PDF — malware analysis report

Static analysis result for SHA-256 17de46e7a2ce22e1…

MALICIOUS

PDF

72.1 KB Created: 2021-09-06 06:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 21e5e187e3ffec835020c8cd4c677e2c SHA-1: 8ad16b9b77fabc0957acf200635e0fa640077bbd SHA-256: 17de46e7a2ce22e1ac10b14b0db1062a0b0a720494e17d077a0eac341567e3ba
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6550

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://autoscuolemontagna.it/userfiles/files/todugurivisajofukur.pdf In PDF document text
    • http://poiskvod.ru/images/file/wukeguv.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202108280831597366.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/kubutoxetanizusofuzobi.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/galizijuwedewixijo.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/54455845724.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/rodarizugurajijedu.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/15693236716.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/wuxatopudolaxifagibodepaz.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/d44119eea3ee7cf73cc67182adbc3f47/36333968907.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/55eadf71be33050f785fd70108fe02d6/32795232886.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/95471102729.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/80676336263.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/98666323581.pdfIn PDF document text
    • http://come2menorca.com/images/file/vokasosi.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/sesugoj.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/likipegulonokalitekunuf.pdfIn PDF document text
    • https://oversaslogistica.it/file/98062635549.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/jovamudeb.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1624932506.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/34tlv9e8vac1b75f9ks02uffo0/51945134403.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/90888136633.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7ab9f2615---57475937649.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b987f864bda---66222654857.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/zareguviselowepuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=rrc+patna+apprentice+merit+list+2018+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 11208 bytes
SHA-256: a7539da5a4693541a0ce4a954f5f703cc4983c89cae838da50f163a93a9ca05d
font_01_sfnt_off00010a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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