Malicious PDF — malware analysis report

Static analysis result for SHA-256 9696fda3b2653d64…

MALICIOUS

PDF

87.8 KB Created: 2021-06-29 06:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cd153eec5e4c1ddb338bdfb7618e184 SHA-1: d3cb451edf5bffba7f13b4c4e9d9f6b0b87d28f0 SHA-256: 9696fda3b2653d64babc8f754a8ce03c2e4a266ca7d76ef9cf6f42a90e17ad37
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The heuristic firings indicate a link farm strategy, likely intended to lure users into downloading further malware or visiting phishing sites. While no scripts were explicitly extracted, the nature of the URLs and the ClamAV detection suggest a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pistant.ru/uplcv?utm_term=talking+about+your+family+in+english
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc2230a0da---86018806829.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a7c3889ac118721a7ed03163b99bd139/81345081194.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888a4a28caf---gumokeremamozaput.pdf
    • https://bestofbucerias.com/upload/file/33189616450.pdf
    • http://libertyquad72.fr/userfiles/file/93734554325.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41b2a6275b---bofosepe.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607700f00acdd---34109209818.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1facb4993---71805349719.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/d7pbj8rlmoc3l4o7v5lv6scg4q/vivejiboxere.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c05c823b1---24371689071.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c38c22a983---buvopevuxarawide.pdf
    • http://notarbrazda.cz/userfiles/file/83887569687.pdf
    • http://pensjonatagat.pl/userfiles/file/lakivisuf.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ea9a0a5b2---witipodixividaxi.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d07dda072af---vemivedexakeboxopu.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/5hnrt0kk8o1hsndf7h2i6ek3q5/likulavavarasikego.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74b5cfc36---zadinajenevuvawupaxepulo.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c66dd0a773d---meludotasavebitejavarese.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/007f932b925bdbd553c01a9ae5303be3/makisogisoru.pdf
    • http://stylekd.ru/files/60450475004.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e0b3c0bbf049ec97da4e2d0c850e5b6a/wilebevimosoxiga.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cece99ff2---vukixofifozirumo.pdf
    • https://ancoraeducacion.com/images/66549506727.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c091bcf5e---makedopil.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/hevquig9cqmjf297v7etufeqi3/zamonuzuzagapibopa.pdf
    • http://gyobel.itpublic/file/45827596025.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/475b82ae8a1f5b685f5617d3c9ebf75d/fexubofesupakeforazaru.pdf
    • 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_off0000f04e.bin
37f05856401c37162ce17411e1118e43b5d7513520d2b733e2897e84b0e09023		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 11072 bytes
font_01_sfnt_off000109fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109FB 16792 bytes
font_02_sfnt_off0001220d.bin
7a302619a8086f0714ca9082d5a4fd0807997f981204137044b13b2312ac7f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 17508 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.