Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeb75de9c8d8380…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 02:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 99d0f89a230c02ed77e5dd5a3adb20e3 SHA-1: 0e1f91b6bec790625a4ff18d0052043f47b816a8 SHA-256: ebeb75de9c8d8380af32ad22418ac450db93601473ad41bab0be898e90375416
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and acting as a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=hisuite+free+download+for+windows+7 PDF link annotation
    • https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/10119071484.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210906_B79E3A9B8DD2D139.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/84699866658.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210919120658.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/vinowibegamowenabexo.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/lakawetagopukinebu.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/newuxidupudopa.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/nupireximibobozabut.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210912015444.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/78995166463.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/refiropesovadupitotalo.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210913173315.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/36043843397.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/68250370473.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/45907205134.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/62605400013.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/86750758332.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/29204871387.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/32352389081.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/kusawomavufisowovodejoge.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16147a2919852c---pufumonatigivuxapesit.pdfPDF link annotation
    • https://sapsda.com/SapmaUserfiles/file/sedawagarakejikoga.pdfIn PDF document text
    • 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_off0000d452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD452 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 10572 bytes
SHA-256: b266f73364ab6e1230172f7953fecc2202fe065bd75c7bcdc43acf0e182f3a30
font_02_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 16348 bytes
SHA-256: 7cc42cd5df101b4e874c95bcc70755a671c93542b7606b65ac9c6b8ea7a02413

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