Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2aa344b95de1a1…

MALICIOUS

PDF

86.4 KB Created: 2021-08-16 20:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 157c5ae05fb6a072acbfa260d227e8a7 SHA-1: 3b65537d0b7dd0f6f8ce813aaba6be9bfd9fe9b7 SHA-256: 8a2aa344b95de1a14dfd129098eef930ce74f4031825fe05c0745224271911b6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://reichspfarrer.sk/file/86315805805.pdf In PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f2nptbb2b0apteq28ah9k651b3/pagatunamekusebetepanavo.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/dumoxulowigagop.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/14965940569.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608148a499cf3---pelumemukedefabemitinuvo.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/88076594720.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/36846513716.pdfIn PDF document text
    • https://webaprint.be/img/file/pivusubusejuturi.pdfIn PDF document text
    • http://seritour.com/rsm/files/dokizokeb.pdfIn PDF document text
    • http://bibikid.ru/upload/61438554094.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3d75873d2---88490067843.pdfIn PDF document text
    • https://argumentua.com/i/file/66390468547.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d4f1a265e---sidodipafenanevuvom.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/jakofugagaminetekimew.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/44171861701.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-7///2021722334346184.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/56575051401.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/gegedekazavapulo.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/49446635036.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/33171679629.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/68787165443.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b400933a7---tadipot.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c224d0a66ae---ridos.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ecbqd4m6oipv3f1idsh5355bp6/16066951780.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/3112659860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=exerc%C3%ADcios+sobre+velocidade+m%C3%A9dia+7+anoPDF 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_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 18396 bytes
SHA-256: dac84aabda4609e309a3ce050f5767c9789ef882bb68e705844a6f4f5fedb834
font_01_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 10992 bytes
SHA-256: 163cb3c7dd9fd4d5a7f9a468c3589afd8b842c560c924eacaf65ed101bdaaa17
font_02_sfnt_off0001305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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