Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b0db949414f118…

MALICIOUS

PDF

83.8 KB Created: 2021-09-01 15:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4aab81758a7ca39499145a2f4b5470c3 SHA-1: 31f10bc757512b2ea720ce4fdbcf19406fdabe67 SHA-256: 08b0db949414f1182bc2e42a4ddc61cba252e87282f78b4d06836d8b9a9032a2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious IP addresses. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://cokhibaosang.com/media/ftp/file/rewetodo.pdf In PDF document text
    • http://desagresbrts.com/clients/34568/File/10039156225.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210619/file/16241307569925.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/77081727954.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/zikewas.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/locudq6rvacgtl05btf9r07777/41158557515.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/15c0e1e34d99034f8bc1ce74be46888a/61106955569.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/genemapumedigigiroxifefa.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/11564139230.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/87803278642.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/hflaeni57a4vl2gcm46i2m2tm1/rawiniziterurusiniw.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/dabuxasozizosaguwebebam.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae637de6031---mibolarug.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a995b910fe16115a8ea684aa6f22ee91/21172543133.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/kexepumulatuvuduwabemosu.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/19959411619.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/080057fea343d1f7b8154200171a79b4/59315967743.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/xutimobumi.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/jinurap.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/99310194734.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/89905513712.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9447177de---zonowup.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/44763111347.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc940b439e---99392803252.pdfPDF link annotation
    • http://taiwanglassgroup.cn/userfiles/file/zonarisuwiwukibopugitovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=monopoly+pc+board+game+full+version+free+downloadPDF 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_off0000e129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE129 17384 bytes
SHA-256: 7d69711d65ad78b72d0231cfef6900eb67c40edfc942d8eafb41d5d2f63df4ea
font_01_sfnt_off00010e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 11364 bytes
SHA-256: 74f0f4652ea91516ce388422381310094e72bb80fadaa9f3136c2457d6cecbc1

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