Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9bc0dbd29fabdb…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 17:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 20ec42360ca74b814c14ae9697038dac SHA-1: a0cc54bffbd19c5d51adf2e0a018f63483af90a8 SHA-256: ed9bc0dbd29fabdb7966744ab437c481c70cb3abc3702f37fa10f9ff0aceb11d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised CMS uploads and disposable hosting, likely to lure users to phishing sites or download further malware. The presence of external URIs and link farm heuristics strongly suggests a phishing or distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://drafthe.ru/uplcv?utm_term=protecting+endangered+animals PDF link annotation
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/raf6mk3o5afrl49au891flmh8r/tibigepurarufudo.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/66380824503.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/61441491418.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mt7jnpt1avn4rl0vvjm8gq4qv5/lewiz.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160f050380a9f3---31900100570.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/86408385447.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd1a3c2620---90625765612.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b9ee534b---58314075329.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7430c3f3a---mopanarunesegawotoko.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7aa728c22---76997315229.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/jikadupotodokivuritajen.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/betokumelafotox.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/78fa4ed8976e06617de95e3bebe6abc0/57190398132.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/28435825831.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/vuzejivaletikugo.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/54657946922.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/dijuxaxazog.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/9940057343.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/mugevojupasatosotij.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/tisuganidazebonafaribu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6b31e6f8a---73303431390.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/vadofubaboxokipajufet.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/13004565565.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/75686944438.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_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 16948 bytes
SHA-256: 910cbc48252bd07feb7bb63c003eafea757e8104d3ee0a18fe93d3350381d6c6
font_01_sfnt_off00010a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4F 10716 bytes
SHA-256: 07a30cb829e080f085aff262b895ad00de2d1200fa46ce75c94143f1694012aa
font_02_sfnt_off000122ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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