Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c06d34ac19c90d…

MALICIOUS

PDF

90.5 KB Created: 2021-07-01 15:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b7f23b94db348bcd9af4f4aa5694b1f SHA-1: 22946f364c5d181da510c79f3db0df7239b3a804 SHA-256: a0c06d34ac19c90db1ccafe65ae8fc994c384667ac7bb687a15bbb6b1080cf69
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation. No scripts were extracted, but the structure suggests it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://1877painters.com/FCKeditor/file/vipafosiwezegiwulanaduxil.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a968595da26---mitekanawitoso.pdf
    • http://innospectrum.eu/hirlevel/file/bobabowogor.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/4rdof7nbfjdsu9pem8ftjiva17/lorijinaxesewepomerukema.pdf
    • http://austral-immo.com/userfiles/files/kazaxifigiserasolam.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f540ec68bb---61594919548.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6b54808f7---90831980527.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160987e021ef6a---23377230599.pdf
    • http://szkolka-wiercioch.pl/files/file/82846901593.pdf
    • http://rotarycochinharbour.org/ci/userfiles/files/kuxuzokoki.pdf
    • http://aquinasnb68.com/clients/9/9b/9b9a52ed12f3b440fa02b6ce64642487/File/48686478882.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/634e7khlmt2s8pihtmo40kkrlr/simiwokivubagutoverarok.pdf
    • http://mp-journal.com/media/file/22131569961.pdf
    • http://kancelaria-perfect.pl/app/webroot/media/files/97197810141.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2ae8708b6---sevagez.pdf
    • http://accronline.com/userfiles/file/47898650986.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/82794403752.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/cu0puc4fuuna4gvm667g6q5gq2/givagok.pdf
    • http://moderncarrent.com/user_img/files/jebujipilave.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ce3834f86---93864618558.pdf
    • https://oliogalanis.com/file/xupexujonavupimuduzex.pdf
    • http://apvn.info/userfiles/file/47791297755.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763a7b746d7---8115883119.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=unction+in+the+bible
    • 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_off00010239.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 16792 bytes
font_01_sfnt_off00011a4b.bin
e8bfdb075ffb4c21012306c52c20115e1daa87ee2e5311c098f3da3b0ad471a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 16552 bytes
font_02_sfnt_off0001454e.bin
55ae4fab7ed737ba5ed7311f46f18352991fc1e6a85bbc9b764788efdb96d220
pdf-font-stream PDF embedded font (sfnt) at offset 0x1454E 10044 bytes