Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6aded5928e04f88…

MALICIOUS

PDF

83.4 KB Created: 2021-09-12 23:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e7f9e8b4068d6d785abb21457147db4e SHA-1: 5e285cda51abeb0afab0629f39a8b78b067765c6 SHA-256: c6aded5928e04f88e1bd567a956432fe1ad6926330a1a8b0095d244becdcb6b3
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as Pdf.Phishing.Trojan. The presence of a link farm on disposable hosting, with numerous links pointing to PDF files, indicates a phishing or malware distribution attempt. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://www.dr.schure.net/ckfinder/userfiles/files/vakeselokasebalamikefiv.pdf In PDF document text
    • http://hoya-system.com/uploads/files/202109021343533559.pdfIn PDF document text
    • http://viorina-deko.com/images/file/16406110232.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/zugufolo.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/puxaresori.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/momovurazumilumij.pdfIn PDF document text
    • https://shibbirs.com/media/files/58778400989.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/rawukumifojuxujasot.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/gimirux.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/8871892538.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/42776333123.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/45226394615.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/fotokugukurefikexisufosaf.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/80660985547.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddfa5587d0---mexukudo.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c80d987a91776e8b8a212dec2ce48839/fumafadodudaxotiloluruzu.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/zudinijojus.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/47899555867.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/xajufowabitamidimejujiv.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/50125165955.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/nuzamu.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/zetiwofizuwexugajuporupav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=crusader+kings+2+android+apkPDF 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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 10768 bytes
SHA-256: d991aaba42c90c9fd2bec724c56e767aa63ef954400899389e30f5e40653466e
font_01_sfnt_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 21084 bytes
SHA-256: 8b342b1d89dfd8f5290818f0272f5bc8426a3ea7fd7e614597ff2aa7b1fe5dd2
font_02_sfnt_off00012802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12802 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.