Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7167e30a253263…

MALICIOUS

PDF

73.3 KB Created: 2021-09-03 21:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aed92a0c526092ef5c12da86c5c89ad8 SHA-1: 15beb7d409e7aa55c2fdababbb81e5aefb2fb886 SHA-256: 5e7167e30a253263a13787b434d987fe7ced90b73145186a0b06be03d7e3ffba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure users to external content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://allytemp.ru/uplcv?utm_term=suunto+ambit3+sport+hr+manuale PDF link annotation
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/dd6e94b665fbc9fa4c95d0f6a177e3e3/99334421211.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/1763993933.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6db49a017853449627f0ab30d74c135d/8205050847.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c866355cd97---jamudisarubimedoneguguz.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec0eefa8e---95535239836.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64d676f134---libifosevukuxat.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/walukezetojaretenorusov.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/8837125067.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/87935831849.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/90955823539.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a9b9f260b---jogekiwilulupuritid.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/69625678056.pdfIn PDF document text
    • http://planbmedia.hu/files/43281209172.pdfIn PDF document text
    • http://irollee.com/userfiles/file/12306883594.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210702_03A6B90C696B1045.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/4377522413.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1627280438.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/zaxelaku.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22bbf8f794---magovurujurepel.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/2799987011.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/tubegejumafaserage.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073495463e5b---motaweviwanevor.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pverf33vu4pf1v6gcra571drqn/rilusekajesaxowakoxawus.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc46d3ae88e---462598134.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_off0000b58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58E 19128 bytes
SHA-256: f32537e716a9df9759af4626f57b20f6e91b00798cb894f47e1b9ba9b02f1388
font_01_sfnt_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 11004 bytes
SHA-256: d4aabebf713e749396b33b63228c2143c830e0fa15e806ffc8dad324a20580fe

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