Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe707398b8222ce…

MALICIOUS

PDF

68.3 KB Created: 2021-09-19 10:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cd15da625f5189480edc151092c4d0f3 SHA-1: b0df0ed97a4c7ff9b844da1085c7c5f7b57a1682 SHA-256: 8fe707398b8222ce136ea3ad150724aa6bd81fe090bcd911723ec0188717d887
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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
  • 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 http://agnieszkapawlik.com/userfiles/file/sizilamotemulagur.pdf In PDF document text
    • http://gold-carsales.com/js/upload/files/22599699550.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/70889134109.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/bupulodexuvadule.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/79245082968.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/wazogago.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/dalutepu.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/jotuwozobodilaxadavupiw.pdfIn PDF document text
    • https://ocw.tw/uploads/files/nobukofobabupit.pdfIn PDF document text
    • http://www.plan.msu.ac.th/ckfinder/userfiles/files/85096207160.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/15915721519.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/43715472508.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/velofezubi.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/92825479667.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/vibepar.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/85908511675.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/19743133530.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/r7q06k3u05jjmn2ge3dk9e11u3/71615753769.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/89650616082.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wiwofamuriji.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133614c2cccc---91936075898.pdfIn PDF document text
    • https://airbays.com/userfiles/file/30796304459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hitman%27s+bodyguard+2+streamingPDF 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_off0000acf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF3 11044 bytes
SHA-256: 433630ae731f97e1f7aea56654b960982951bbcb5730949c41988a0ab9ca5ae9
font_01_sfnt_off0000c68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 14764 bytes
SHA-256: 57568146f09f13f1949ff286193ed903a9b9547258922ba954ed41d0e24e6fb6

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