Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2bda4090d2b559…

MALICIOUS

PDF

72.7 KB Created: 2021-09-02 08:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 91a04f69544a6ec5b7f66e847b1e333e SHA-1: ee6f21b1f2bfa6a367764410c37791263c8e9bfc SHA-256: 0d2bda4090d2b559f6197fc96646209fde989cb9dbf676ca7c35c1fc4716a901
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/94e0455285af4a970f6d8d4e0a82e13f/wowupinika.pdf In PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6df4f4138---momuzizelaxonaveropemazad.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/54729400873.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917b1777063---juponunepejalobeneg.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210712221359_18310287.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/xadobibog.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/b0ab4qqcr18qlu70mr293e12iq/24483880736.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/62408153398.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/daxuwekazurimudeku.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/favazuroputip.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/10919711611.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/tubetisojaf.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdc34a1f46---porawu.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/ae22135f2a7913a67ecccd67de664f4f/68852679720.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/9598009943.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/11190143263.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/fomotavazokonozakegela.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/42300050865.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/92817475396.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/zisojuwadudefaluwanosuf.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16090bf9550693---18941113413.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/fixofuwokikebazamo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=giant+green+anemonePDF 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_off0000bef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 10276 bytes
SHA-256: e912c2d12cc887c02c7f02f4b6d514c37cc10938501fdef709db3f98fb61b821
font_01_sfnt_off0000d61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 15360 bytes
SHA-256: 02c92898356b7eed8f9ae88232dd9c46e11d58518a2804c8f4b9bd86cae15aa4

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