Malicious PDF — malware analysis report

Static analysis result for SHA-256 01af70f0e2a12138…

MALICIOUS

PDF

81.4 KB Created: 2021-09-13 19:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7192379abe0540977f3e842db35b3b30 SHA-1: c11c8f3dc229347f0070a9ea251eaac49782574c SHA-256: 01af70f0e2a121383c2ecfd03de021ce2e25f7849724a62c8be1328c4db2d887
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=shadow+fight+modded PDF link annotation
    • http://morard-mcf.fr/data/Files/sudesuzewurid.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210903_075033.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/87591894952.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/63663680328.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/jirulubil.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/gokanezijirowagop.pdfIn PDF document text
    • http://istvietnam.com/rich_editor/file/12064644906.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/zigomexejix.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/32554901601.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/magonadi.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/6fv5tbioabuj11p3khvstp16hj/79490532357.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/medidojirubafe.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/pinulozabaxerutak.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/237056fa6652889bcd17975fa6e3a47e/misiba.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/68175583672.pdfIn PDF document text
    • http://myredm.ru/uploads/file/84741674605.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/37179263744.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d24edb4efa---wotarafus.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/13732645661.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/7138aa26ddf79387a7db845b3c872c5a/18862891186.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/56087290891.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/mowamema.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/niwezunumejized.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/dubawafozuniselabodagi.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/20109428025.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/40452421474.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_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 10544 bytes
SHA-256: a6f6b3a596eb43cf0bbb1e3f78214533164557ea3cae5d665436bacd9c003986
font_01_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 18648 bytes
SHA-256: 3c700226225a4b464601c8b81ca87466a36b3ee599392426e2c05c5ec0597da7

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