Malicious PDF — malware analysis report

Static analysis result for SHA-256 037e6ab38626593a…

MALICIOUS

PDF

77.7 KB Created: 2021-09-17 00:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d1e0dec797026362b1dee8b4e678d7ea SHA-1: b52a41bbe96a43bf2ead8948495d313a7c22230d SHA-256: 037e6ab38626593a5f1a1d268b399a4cb9c820b79b704b809144c8a933f61398
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, with several hosted on compromised CMS platforms, suggesting an attempt to lure users to malicious content. The presence of these links and the detection scores strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://p-itos.net/admin/userfile/image/file/nurajaxom.pdf In PDF document text
    • http://conblocmanado.com/pics/file/44156200563.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/19187733353.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/fazinop.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/47939937286.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/49430547911.pdfIn PDF document text
    • https://buyafranchise.org/files/files/37676236860.pdfIn PDF document text
    • http://p-energo.ru/content/file/52544517058.pdfIn PDF document text
    • http://batistar.fr/userfiles/file/27214836855.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/44356394263.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/412b7269f4a96bac1704748ea8508053/64642996448.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/tenejimawexariwavavo.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/15188312743.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/c5b1s600qk0liftcke1tfr2ts4/67409960454.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/63603977360.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/nipasulexaloxe.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/vegefazenabubom.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/itnjl9scsipaa0801hph55dos1/lugokomumufosomapux.pdfIn PDF document text
    • http://ktai.lmg.jp/upload/file/3433301872.pdfIn PDF document text
    • https://blugarden.eu/file/44399014591.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/43085316737.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/salonotiromepujekex.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/p2iup8c531sn0p06tqd1v1csta/xusatef.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/gerir.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/luwafotifojudob.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/lurimabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fitness+apps+for+firestickPDF 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_off0000cb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB12 10496 bytes
SHA-256: 860e7ee7e244659ad1628eb7eff3b930981fcec2e9df0c8b37a43279cf6de74f
font_01_sfnt_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 17568 bytes
SHA-256: 1d96256c527b020f90fede957646833a2f6fb5142c319c17a0fcee30d0cebc54
font_02_sfnt_off000110a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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