Malicious PDF — malware analysis report

Static analysis result for SHA-256 6514551acff7a482…

MALICIOUS

PDF

86.2 KB Created: 2021-09-09 04:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8b9212741e083acd8f07b549a47aabda SHA-1: 8facfcd5f9f2e5cdedc0ba0949ea023f9241f79a SHA-256: 6514551acff7a482952ee72463558d611453fb16e2e1fdfbdce2589c31130fbb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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 https://gulceoyunlar.com/calisma2/files/uploads/zemovodubuwozijobilowuziv.pdf In PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/15248888876.pdfIn PDF document text
    • http://autodilygood.cz/files/file/gubarejujizosilifalop.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/59824766343.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/sijemananukefofoxupo.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/durona.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/cc8e2735f082de83a433ab6b121d5edd/zejiripepowinokowafu.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/64984887098.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210908_50FCF4EB36DCFFD0.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/luvubuxikafodo.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/79776974774.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/kuperasujam.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/74399606308.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/1561746605.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/kazaxi.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/34480965344.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/pidemizot.pdfIn PDF document text
    • http://na3.it/misc/file/57577128445.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/60a025b4baef3e38f14031862aa9a592/bilofobaxorubivobufidesil.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/mudigijixeseluzor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=aplikasi+untuk+menulis+di+layar+androidPDF 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_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 16784 bytes
SHA-256: 018fa15df480960a3f606496f2272a20df453f4be7e6d61133d5c9845fbb0af4
font_02_sfnt_off00013272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13272 10840 bytes
SHA-256: cba828795b91f7951a68e987f5c274f02743ce415474e37e40f2c663565de303

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