Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c42ddb1a9c97b3…

MALICIOUS

PDF

81.6 KB Created: 2021-09-11 21:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 243512a58dbd59d4e6ebbc2a22e417d3 SHA-1: f2bb4074e23c81b91e47dd5b8ec46dc6da1ca06c SHA-256: c1c42ddb1a9c97b3e9ebe7dfe2c018130889f697d07089536fd7ae3e4ca31b9e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to unknown or potentially malicious domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://utuin.net/files/fckeditor/file/bekidelap.pdf In PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/19276323166.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/91010531840.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/kibigixudajilojepisuda.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/27649593497.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/1817219067.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/wesuxemodep.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///65448713986.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/52274445698.pdfIn PDF document text
    • https://drlanda.hu/user/file/12737023620.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/65592684453.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/93f6dfcbe4e0b2a3de4b18dfa9202c14/83455159433.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/loxigemusetatevuzisogo.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bmfpbj1vv0okgh667ikdab7tb5/17546333538.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/negosokiw.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-9/20210909143854645953.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/23511556314.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/ziliwa.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/19207692386.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/58098837878.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/lizuxuragusegowugolimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=irving+chernev+logical+chess+pdfPDF 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_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 18340 bytes
SHA-256: 260246f735fd2d52b238f009535d47f94302d44884f0b3e75bebf4499fbd5c5b
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 10820 bytes
SHA-256: 0d63568b68c48adadcddefa27cadae5fd3755ab6939b0a8425f50bf29ec202af
font_02_sfnt_off000120b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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