Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df3076b2eb76f3c…

MALICIOUS

PDF

87.5 KB Created: 2021-06-28 18:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 10ea294de34862eafd52b6639794b9f6 SHA-1: 4cf4248925c13c9a26648a17918b439acd225e80 SHA-256: 6df3076b2eb76f3c42c864c643c8f146f9bb88b13b8a01e178affec81731116f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c44d9e63---zeputovaximexulakafeke.pdf In PDF document text
    • http://nelly-design.ru/upload/files/38835767647.pdfIn PDF document text
    • http://newo.ru/files/files/62606947262.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/4e609c2461b4e40a907371254bde5be6/wavigabob.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/de7bc48900afa0ec4c6baae40b69234e/kuzejodomorawazorev.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160781a731b763---fulijasugojuxakaligiwaven.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/gunezotiwefoluzidaniredi.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/99143118647.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608051aa61315---13034637131.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/62647444315.pdfIn PDF document text
    • http://kap-group.com/ckfinder/userfiles/files/68363739781.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b028f82735---tibaxelolaxerabevozep.pdfIn PDF document text
    • https://brs.jo/userfiles/files/46285635593.pdfIn PDF document text
    • https://artenika.pl/fck/file/difumoxo.pdfIn PDF document text
    • http://thongthien.vn/upload/files/meriwonopimemeteru.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/82372991775.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7d3899320549259e3995d2dfe850ee55/gitekeporuvebuwejun.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/65678452028.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qq0mggngj6ndo29fkbf7apnne8/31810534347.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afb4fe6675c---12808881794.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c03e517f410---85526032404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=creeper+hiss+sound+effectPDF 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_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 10640 bytes
SHA-256: 6eb39477aae4547884bfac5fc3b9d5e42f6998a959b9eb6fbb2b247f9f650151
font_02_sfnt_off000124e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 16956 bytes
SHA-256: 36c46bbdc4f0a359e959a98a1dcea0e508602576d3a960937b443dec2d4b0b4d

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