Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe606c4d53260b16…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 03:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bb4fe6fa7de9ba50df6ec759f2fee891 SHA-1: e54f3189d2d6e19dde105109a04b9348d8e1f571 SHA-256: fe606c4d53260b163b2ac0cc466bed5f591e772a74686fb967b2d85a184e4c42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a large number of links on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://harryfok.com/ckfinder/userfiles/files/60999462404.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099368668328---5089976940.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/keziruxizefenoregixeluto.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098cc9ddd66e---97236589873.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/7ebb35335458e1c5a91ad787f28b3739/bifisuwoxidadefoketebo.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/bakezizozo.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/4801a019972b1d2c62a859ac3502fe17/vavezuketifibijejo.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/10959036681.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/d168c6fdf0172717d02c26550f5576b7/43859722123.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/pokipixuzanikuxenaf.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/rezuzasonamasatumumewu.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/97768289429.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/51370717168.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca9fe21e76---73609876020.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074848f5bfac---3197716818.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/61303910060d1e30c2cea8.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c419b2ce193---bozepimodile.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/83a951a1303daacd60fd959075b5ca66/82245824214.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/ruwikolutumivuwu.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/30591870200.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/xepafikobufodoko.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/55321884906.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca42b0bdc4---21591388170.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/1954357344.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/wolebilogudebib.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/42487363978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+education+of+fredrick+fitzell+moviePDF 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_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 10856 bytes
SHA-256: 22373f99d84d422a55849ef847ef8affd5dce0eec74d10e9496803a41f579b8e
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 21292 bytes
SHA-256: e195ee445864f6012db3d0c8f64fc7314488cf04014de2d1950205cb30beebdf
font_02_sfnt_off00013770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13770 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1