Malicious PDF — malware analysis report

Static analysis result for SHA-256 093a2bf65de80c76…

MALICIOUS

PDF

92.3 KB Created: 2021-09-02 18:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1d5b7e8beaaac709a3977d2512ae2f9c SHA-1: 30990b7379bc102b846c5d28d7a1824ae783ea83 SHA-256: 093a2bf65de80c763636ec04c1818c04d13473cde0b6d4ec59555b0a3dc44e85
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://armagedonspedycja.pl/files/file/70792577031.pdf In PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/15773354162.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/39119940221.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/16e2deda87b96972758ec4e73c1aa220/69310207004.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/24630237858.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/80838624887.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05e271f3f7---kedewomagolexujosos.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a21ff72394d---37356305562.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/virosipubebuxuniw.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5cee5acfb---pexudukasirefogesuxuxu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7b53c06c---27519051984.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/95644367341.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/8959235682.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/46833536806.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/14788284913.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/webamawetibejolepoxesalof.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/3f38879a7887c1329ad59d7872170f31/10736027552.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/sisuworugowopegep.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/balaboxafojivisinesatid.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/keriguwifufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=learning+hungarian+language+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/6a4843b570e00691a5095582c61952ed/wusuza.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_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 10448 bytes
SHA-256: 4d9fe7a7f40b737f525008b7359c251e1d4fdda31b6820d28ca7273fa3a334de
font_01_sfnt_off00011a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A63 18836 bytes
SHA-256: 10ba3cea3fca8e3bab60c8257e077ee6376dd439ca38a058c52e15c797574a8a
font_02_sfnt_off00014ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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