Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b24b3c65418a32f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 00:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1606c7ce1407bbeae44accff2710894f SHA-1: da491cf6ef455cc5edd967ed4e45f4725dd54862 SHA-256: 3b24b3c65418a32f09777206d47b5a7867eb9acd16a7105a3fae2e01b1502af5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://wastran.ru/uplcv?utm_term=nobody+compares+to+you+one+direction PDF link annotation
    • https://5udua.com/contents//files/23816395134.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/620bcb1b1d752a18b7775d3aa12851e8/38976294884.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/widaxerezanozefiwuzizub.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/7g62g53c6ef6nqg7qr225hhl58/suxexif.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160971d8d960aa---fatogasarabokejaw.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/lerewupemabulivuzodamukik.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/samagilisejap.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9cd2c1793---68308233930.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9960031754.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/91289925bdc457a2f831633bd342e6c5/97996488548.pdfIn PDF document text
    • http://12shio5.com/contents/files/gefoxedivesisimagoruwega.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac97876654b---tovuduf.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/e0noghj9bu9gqg5tspcgmhfan3/85623093101.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/29504082204.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/norafovu.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/15717633311.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/edb1a86d42788899145d96ef1179fc27/levezenat.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/28e143f063fc4bb1123230b88f2a97a3/xesejusorexemipunolubawo.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210731202515.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/ziligifid.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb1fa48c98---tiwuwakufukeximu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d2b8dplmahjpuak30fsdo1sru7/66797078991.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/bozepokamirelevodag.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/zuwudibesejobaxifow.pdfIn PDF document text
    • 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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB1 10960 bytes
SHA-256: de2d6ec5c07b89bc3b7e34e61f3608311aba4c62702e70e98f3a47da00a9de59
font_02_sfnt_off000104eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 17088 bytes
SHA-256: c4c19d724d21eee5868fae9e5b249024a370bcdd58e39bce9e8bbb67bc280db0

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