Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edcc36f19e4ae88…

MALICIOUS

PDF

78.6 KB Created: 2021-09-07 04:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f47d0a2704e1c4195d41879153a316f SHA-1: b8a3c56c9df9b2375f7efa461c0ada9cebf76bf4 SHA-256: 2edcc36f19e4ae88130cec5fd7870c742bf8778339a278c1ea45b17e3dab19fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories and disposable hosting. This structure is indicative of a link farm designed to distribute malicious content or phish users. While no scripts were directly extracted, the PDF's nature and the presence of numerous unknown URLs suggest it is part of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083590bba7a0---49573776167.pdf In PDF document text
    • http://flomojapan.com/upload/files/jibopofububufojiwifevaxe.pdfIn PDF document text
    • http://ruihuitax.com/files/file/rubaz.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/33193898312.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/gutixopuvodivikup.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/68832604206.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/logol.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611de58ad1b12---97242024581.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/b996a8a6a933046ea04f80990f43be6d/wipulef.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/nozekepema.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613688ba55d59---63453820845.pdfIn PDF document text
    • http://placc.info/up_image/24431678745.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/8642753832.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80347be58---doxew.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088551fa2619---88557604717.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f8d6749b3---depabeju.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/97369128333.pdfIn PDF document text
    • http://jcaf.or.kr/ckfinder/userfiles/files/72150827065.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/57580895993.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/zesozulok.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3781531cd7c6bf87ebf5cf3c5fe54a61/tidajarezalemevivunozeg.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/94333553516.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc1df12b79---53993108356.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=siliciclastic+sequence+stratigraphy+concepts+and+applications+pdfPDF 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_off0000cde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE7 11332 bytes
SHA-256: 7004a8352c4c501ca880af6939af583f475e96fff8b4b9af458df80a238abf6f
font_01_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 16804 bytes
SHA-256: c8060cf368383e4ac5548d90126a324c210ea0a79c83127395253cc24892919d
font_02_sfnt_off000113b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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