Malicious PDF — malware analysis report

Static analysis result for SHA-256 07361b6a1d73611b…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 15:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d648a92ec805f5992203ad239f93d8f8 SHA-1: 94a4f845721e9ec101fc023aa0224a6eacf2a648 SHA-256: 07361b6a1d73611bbd941e1647ad65fe49af9dd07643c6a91cbfa1b47980daa0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

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 http://paulsaperstein.com/userfiles/files/paralozamagifajomitafab.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094227fe72b1---fukejoverogodobu.pdf
    • https://gberwanda.com/gbe/useruploads/blogs/files/8328949242.pdf
    • http://prmakeup.com/Image/files/lojodukubuvedalalu.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/vtqi3b6fbnd6ptdhe2j86otfjo/83468057668.pdf
    • http://bike-aholic.com/UserFiles/file/31424364766.pdf
    • https://avela.md/userfiles/file/31038250503.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6bcd383c6---turosofepigew.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/18f20658d72b04cfa948da0bdb790516/33077719643.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc39383273---resofiba.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/7oo8bpfn62qu8eoobdbnrs1pkv/25412191332.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/358b7227ab05e9b14b4a3a7425bb3d61/wegifuvaletesur.pdf
    • http://aliglobshop.com/userfiles/file/24262861906.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/dff652925c8abc656d9685f468a6a669/50219768693.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080c420c9e21---tekedajix.pdf
    • https://harkakotony.hu/UserFiles/file/vasetupinemaxevozabazubin.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6972cde72---70468879949.pdf
    • https://ntpuvoice.com/ckfinder/userfiles/files/25018268145.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2704a1dc6b2f59ceef914d41211c62dd/69813464060.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a285d5c17a2---gidemixojizetase.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/da985c27b0d9c3d7727b8db410dca869/goxometinizemitufuxize.pdf
    • https://daiichitravel.com/uploads/news_file/89152105625.pdf
    • http://afgventuregroup.com/cfiles/file/sinamameva.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/6a44551b67329c1a7ab8ac05f7a52424/vukivaj.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb38e4da0e---20861704495.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=premier+student+loan+center+contact
    • 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_off0000eef0.bin
341e69f3e01c209b06f59099cfe1080975d5ec59ed763d150394e68515c1a7ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 10632 bytes
font_01_sfnt_off00010742.bin
c0caa78bce57bee8edb3f02db2d95e24661d9730105f76fb125f39606a5db039
pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 17524 bytes
font_02_sfnt_off00013470.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13470 16792 bytes