Malicious PDF — malware analysis report

Static analysis result for SHA-256 febfe5e31c36f410…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 04:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 671fdc5e4f3acc2a22bc3c7b01a23b23 SHA-1: 7ddb0ef97c7ba52d2a69bada4fc8e2184bfbb465 SHA-256: febfe5e31c36f4108bd586259f521785494c38fd80f25aa292620d79e7da63ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of PDF_URI and EMBEDDED_URL heuristics indicates the document's primary function is to facilitate access to external, potentially harmful, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5212361d2---gulijizizamikamatitosevaj.pdf In PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/71080964183.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/rapexaxerubolivenewunila.pdfIn PDF document text
    • http://abwessex.com/uploads/files/71491690663.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/74837625463.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/69658368871.pdfIn PDF document text
    • https://nevisnews.com/userfiles/15258182471.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/xiparugevimikijilugip.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/gizajafijeberewu.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/92200974832.pdfIn PDF document text
    • http://debrecen.varosom.hu/userfiles/files/guwudetegapububep.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/wibinatijejofomulixonuzet.pdfIn PDF document text
    • http://telektrans.hu/editor_up/wevuvuvikoteninematufu.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133970a88539---dubesipevazoxafo.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/wuwula.pdfIn PDF document text
    • http://dhf-china.com/d/files/fidolasowogoxewuponuvene.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/sodusaji.pdfIn PDF document text
    • http://hak-al.com/resimler/files/77817658581.pdfIn PDF document text
    • https://aromamarketing.md/img/files/56218055869.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/38254907752.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/voriwisipezajaxitera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=can+i+see+who+viewed+my+instagram+accountPDF 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_off0000da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 18168 bytes
SHA-256: 8ff495b8ededb3441a2f2c8d1f856f9eea5da79bf0b034a394ba475e3f9aa8c2
font_02_sfnt_off00012101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12101 11168 bytes
SHA-256: f9ce1d530b1aedfca64ec7d97fca2155ed21ec7487b6eec9d2fc5f586eb52d6f

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