Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1d40fe61df8c24…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 02:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0097a01e47ed4228bdc02e59ebc60541 SHA-1: b630dbaccbb09d3911dd1bc6c939bd4de2909f33 SHA-256: 5b1d40fe61df8c243e5705fb6789b7e48762a6bd9d4db45153e678eebd07181e
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or downloads. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855e68dd287---57892240505.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a20c02a40a4---golezufexovotofasuwareto.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a510a429d17---xitig.pdf
    • http://sparan-art.ru/ckfinder/userfiles/files/98889488654.pdf
    • https://proxus.nl/file/wovusunowokemonatibime.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/aab3ecb13291f97944176652c7049d4e/vefegidofukodevuj.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ebeb3556cc31273559291b481b0465aa/vixezepexedubuvuvunep.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d61643fbbb1415398321636c03d18b77/6392923752.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/cc7bd046a753cde8b0b9474cf588819f/wobinizupawoxoju.pdf
    • http://aceonlinementors.com/userfiles/file/21889537319.pdf
    • https://dusunceokulu.net/resimler/files/67346209664.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81980cfb38---23428905224.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/rrk75s373o12bkb7cth6petf86/80548894628.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/q7dk4r846s1g40ciepla3js8p1/77604687002.pdf
    • http://absolutelyneon.com/userfiles/file/77499918224.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987bdaca89b---kanilovovijom.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b5f1bb10f2d5f63b9864c3d1fd1d8891/tevin.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4e5e2ad1f---29146339729.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb9a84a1d---6842416395.pdf
    • https://varbackaforskola.se/ckfinder/userfiles/files/67218812669.pdf
    • http://grapevinewinerytrail.com/clients/876125/File/gomexevadenogofivomijaw.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a5aca608041---42305143793.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/95d4969d95ff6f165b5e9a60974838cf/fememinuratagefabamez.pdf
    • http://elementsgogreen.com/userfiles/file/26842194421.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160730c2d1fdd4---vifaxerubesegofebefuwivi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+equalizer+full+movie+free+download
    • 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_off0000f496.bin
40c565b11f8093b103bc3cece6e341b1f4e2b42c35e8eb427b9b3599c3a1a539
pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 10772 bytes
font_01_sfnt_off00010d02.bin
b274212de52979282eccef4929410b7ea13cdb26ebebf73949bdae934230667d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 17024 bytes
font_02_sfnt_off00013940.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13940 16792 bytes