Malicious PDF — malware analysis report

Static analysis result for SHA-256 2547f11f80cc1aee…

MALICIOUS

PDF

93.7 KB Created: 2021-06-27 13:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07a72fb1b3ffe38c23f42c81ac2390cd SHA-1: 8a1c09ece89a76d26142183b2b5965a38d1f2dfe SHA-256: 2547f11f80cc1aee1e49c60f59cec8e4301eb63829b8d5a6d0aa8513be4b98cd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to redirect users to potentially harmful content. The PDF's structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=can+i+use+stevia+during+intermittent+fasting
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bc1e84eec---87227341252.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd88b5627---28613344706.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfbb0e8e77---gebemosupafa.pdf
    • https://mdteam.se/ckfinder/userfiles/files/69449301262.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/u0nedhhc1na8i0tkfvgip382qn/34047738599.pdf
    • https://agatanorek.com/files/file/fejidikov.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e03b2533b---waxifumuz.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422d991cda---99990337904.pdf
    • https://pnlcoach.com/misc2/file/
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f00b2e523---45205277099.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a5c76e9c---pogenapavawiwoxose.pdf
    • http://afghansolar.com/userfiles/file/fupuxaladiwuxe.pdf
    • http://akinmedikal.com/uploads/file/menawaxa.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d79361deb---nitofizaduwapesuzitabupiv.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1939125ed914f7682bfaf2201d63c2e4/gegumugogiboxolivegotike.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/25273c7eb0ccb110cbaa97381c44a573/viwuzota.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/86c56236556d963b1ea56f2a55f622db/kixikosa.pdf
    • http://bet-balance.com/userfiles/file/81605950116.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f78318e37---jejof.pdf
    • https://burlingame.com/wysiwygfiles/file/notosamotisedojadawewiw.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcb1d6840d---kozoparijal.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/ab2688bbde0a8953323810a51f37ba74/41216382049.pdf
    • http://jarosi.hu/files/file/61493272397.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2a108c7d---81857358017.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/m9csf4m92e1afn1hvk67j54eqq/48851479317.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010820.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 16792 bytes
font_01_sfnt_off00012032.bin
76c984cdf3a3377e12bd4317121649a9f752ce04441ab57610b798ac20aa05bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12032 17856 bytes
font_02_sfnt_off00014eb7.bin
ea3acb24cfab5327089a841d8cd955faa152e46df96c7f4413bfc7b03e769874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB7 10728 bytes

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