Malicious PDF — malware analysis report

Static analysis result for SHA-256 7600dd60cb4d71da…

MALICIOUS

PDF

86.2 KB Created: 2021-09-19 05:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b035d827298458444316f2e05621a58a SHA-1: 4e13109e2c5e76bf33b1c10710be979fb49930c7 SHA-256: 7600dd60cb4d71da20e440d3bb971a2c007e23b6f568f7c695f61a585a18afed
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier. The 'SE_CLICKFIX' heuristic indicates a social engineering attack that instructs the user to press Win+R or paste a command, likely to download and execute a second-stage payload. Embedded JavaScript streams and numerous external URLs, some hosted on compromised CMS uploads, further support a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dubaimotorcycletours.com/uploaded_images/files/retomawisoxifipazovo.pdf In PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614697a0c31cb---75715529691.pdfIn PDF document text
    • http://keacg.com/upload/files/jimif.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/44990045484.pdfIn PDF document text
    • https://membermimpi.com/contents/files/49216285538.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/sulubazu.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/rorozin.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/xikupameji.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/narorunonemajusuze.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/7rkbn2lcbc4c85pk2rkrnm6ora/7166041836.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/82075828263.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/kijide.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/87655491834.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/telamifixipaguwojipowexek.pdfIn PDF document text
    • http://scpt.it/userfiles/files/80681998759.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/11083354554.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/lukununupejiwigosipo.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/726542630.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa14e4043e---bevem.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613331f75ee4a---23879567531.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/13011334563.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/82460608087.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/pilatuxivomerubefozup.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/54387339910.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/lisewevapipowavebi.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/rogitarugelopopaderujixeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+create+flutter+project+in+visual+studio+codePDF 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_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 18384 bytes
SHA-256: e638181d4d81a43d5e3d0e1a46cc2c953d9dd863613f65048fd9530e38056d55
font_02_sfnt_off00013106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13106 10988 bytes
SHA-256: 1adfffcfbd02d632b9de6cb1529a11a70d68c35fe9462f6f2ce6abde85f65a39

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