Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d05124b221d903…

MALICIOUS

PDF

115.0 KB Created: 2021-08-16 00:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d4d726024826bcb571801e72f095d6ab SHA-1: 87b3934c421928e08c2e338142ad08e13c064ea5 SHA-256: 98d05124b221d9038cfd94ba0e40c3894d55958927d427cea547c9195ffa692d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it is used to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a622deeedbb---xapafoduz.pdf In PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/55576280040.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/vbdn7t1eeajnec25dbvocgvmk3/wuwugedagejuba.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/zefabeweru.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/310158528964.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/xopupuv.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/xomurazedixureruno.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/1m555pfgm76bfkpog375tikkm4/75554943182.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/35906824266.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/umptrgo6mmpqor5jdq7n6nv9u4/xopoji.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a34818ebbb3---65762698183.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb30aeff41---28231157904.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f93b8f2a77---21838444231.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/25665797733.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f1ed0c033---kunujegawilanib.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/gogogajovelinos.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcae11fe1e---26280299211.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/6v1quve8p2gihqa15tslt2f08p/96401667412.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/lituri.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/klc272njkg8epnras32m0n63tp/4737616089.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/864ac5578189f238085b87ab95a414e7/xawevoka.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210610_6BAB0BEF9B72533B.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/bevatipos.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///31919862246.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/luwarulemofixarebofiguti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=palme+11.+s%C4%B1n%C4%B1f+kimya+fen+lisesi+soru+bankas%C4%B1PDF 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_off00016052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17864 16772 bytes
SHA-256: 6059978ed7568df3bc9da003e18e249e4c791686657978a044505dd1527b91a9
font_02_sfnt_off0001a164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A164 10888 bytes
SHA-256: 714ccea60b10d90cd1b22ed53bbf669c1767bb8cfb8b2a0a8647200104b25626

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