Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a6f6295b83a1fd…

MALICIOUS

PDF

94.1 KB Created: 2021-07-08 09:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7ea8d808097cff91cc38722f957dc521 SHA-1: bd69f4595b345246cb127cc68321e90b4008a48f SHA-256: 38a6f6295b83a1fd2ffdba46f94d748e39abc26d4ec1755b01150e4e8ca34fa6
156 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 websites and disposable hosting, likely for phishing or malware distribution. Although no scripts were extracted, the structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://pistant.ru/uplcv?utm_term=meaning+of+asmr PDF link annotation
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0307a5771---waxidakeponovaku.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ec887ff5cd5c845b95f593117ac72400/dumixenizoludiw.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/mudameroxab.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/2p8b6lju6eb31aarr6ht01asdk/nodogugufujogomori.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/o9aiqnbi7pndn76cd3r275p50p/65215651715.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d3ec17283---66741114802.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a07dd470f8b---notexijibegu.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160852f8181185---75308684392.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/e43c0dd08e6c391c5e5af585c87776d0/74829648590.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16094669bbaa4a---makopadewupedavuvekabuna.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/10c26a1e439da6e254569f425f6ac190/dekovali.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0afa50bf5f---95020425962.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5c599a835220175c42e3d07faf2a935a/dewazixukujutifozezitaw.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/zefosusosegadoruw.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105051347194417.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6f67e100e9a1afe565896123063aa01b/zujol.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95510828156.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jh98d1vrgodu56bs7vft6p2ns0/tidimesirivukevozalobo.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3a39d7bf82bfff4f65a14531a611c841/setirodukezadem.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/1026067197.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210619_055426.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/26442601514.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65d169d34c---33934698790.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/27672223606.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 17976 bytes
SHA-256: e095696a76763a274f218782069606dfc0cfbc19269b4f8f8da39fc776824e59
font_01_sfnt_off00013322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 10404 bytes
SHA-256: 0fa91696100f8c9bbbf6bd005215dbd99718c55371a8571a1a61ba9b5531a089
font_02_sfnt_off00014a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9B 1736 bytes
SHA-256: a970dc50f3fc642965faeb3d6f2817be39c8fee70eb220fb851f6e1b0fd382ad
font_03_sfnt_off000152df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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