Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75234059fb3a832…

MALICIOUS

PDF

70.0 KB Created: 2021-09-13 20:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aa6e9acb865faac903a8a67dec791f75 SHA-1: ac8908ee320d8eb6aeacf7a10dbf616190ec0fd2 SHA-256: a75234059fb3a8324f76665b59c11a30e61be0b5614403b225f1b6496e365365
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://dealershop.es/userfiles/file/fajaranovemaril.pdf In PDF document text
    • http://fractinvest.com/uploads/file/58563148201.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/39807419039.pdfIn PDF document text
    • https://nevisnews.com/userfiles/42074471270.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130054b34d9a---24940243749.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/tuwotudeku.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/tejeroforatugux.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/wifobujuwomerazevomuruf.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/14551496126.pdfIn PDF document text
    • http://kco.su/userfiles/file/65678653465.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/4503e8c380bfab56dd0ff99adaca79ae/15252101573.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/73110831067.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/luledebedik.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/duzedepodiwivib.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/fububusub.pdfIn PDF document text
    • http://asid.rw/userfiles/file/viluxilisaxupaze.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/bepavuj.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/ruluwefejoragadizoxomewu.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/zorofefodezufuxuwenebiro.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ccf952a388c2d25b6a12c3cfd3df3614/sakifabunefer.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2befbe96b37fe598af9b6399d9c863e6/84100786211.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139be463b37c---mobodananajagiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kinemaster+pro+windows+7+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB430 10680 bytes
SHA-256: 035c1876774421cd67b6911413f6bd9f7af3b0c9fcbff0499481ed2df8d10ac8
font_01_sfnt_off0000ccba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBA 14748 bytes
SHA-256: c56e89e43564d6bfbc134ab2b6f551ebfe4621041ef471f52726277b22f8f8ff
font_02_sfnt_off0000f227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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