Malicious PDF — malware analysis report

Static analysis result for SHA-256 94796b016ddd31c4…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 06:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cb1e694ea87398e4fceec762754d617c SHA-1: b4e9fe26201c048fc7784fe0dddeebf6639a1f8c SHA-256: 94796b016ddd31c41b0754e67760712c2fc7ac968f45c45d5a0703d47dbf1a7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The primary attack pattern involves luring users through these links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc5a49759---32716124989.pdf In PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210731_B302765767022249.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebbcc5597a---peralajatezilugizagalamip.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/76914183368.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4521baafbc02c58e2005f109266257e6/93153909016.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/rilosupotemuru.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d5f5369c6---16634913243.pdfIn PDF document text
    • http://www.heksan.com.pl/file/tukopetuwokita.pdfIn PDF document text
    • http://yilip.net/userData/board/file/2363035035.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a8e15b9c2a815bcc03678d4ac50ca44c/kefixedejebupovumesazobez.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/dunukejosomufoxopenazuxap.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098163b805ee---duzepixuderesinozuget.pdfIn PDF document text
    • http://panteres.com/files/files/benomupipogiwepep.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/45257776282.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/rh6p6932s4difot0naeh2j7001/75674644099.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/41279010070.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/bepesunigobaxuwus.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/zixenelewegupunifikof.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/95935832548.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099749fa9baa---46408027768.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/po7e2a0eeac7t6fdie4h7bo323/gunadufesuvakilanotiliz.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072332cca5ed---42688162756.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/solojunafitosagevuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=bratstvo+crnog+bode%C5%BEa+kralj+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_off0000cc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 17892 bytes
SHA-256: 4412d96693c890313f1b0b1ab81695132bb1e2237c0211e754906c4c544d50bc
font_02_sfnt_off00011190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11190 11268 bytes
SHA-256: c94f64db516f2594071f5b65848452d2ea45a188ff075dbe65057d1769f9bb80

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