Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb49617b54cd2323…

MALICIOUS

PDF

79.6 KB Created: 2021-08-01 13:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5423abd2bbffe090d49374b5798d78a9 SHA-1: 08bada1b028c67f13c00803e30c6fb6e4e617ed4 SHA-256: cb49617b54cd23237127eb257afda41627c2406912ba56b3954e62ab4f026dd2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a phishing or malware distribution lure. It contains numerous links to external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to host and distribute further malicious content. The PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4611

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://albatrossmrn.com/konadnew/userfiles/file/90635275640.pdf In PDF document text
    • https://wineuniverse.us/userfiles/file/zosimobulo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/a21cn51uvqmjue59n467coit53/kesejub.pdfIn PDF document text
    • http://www.grifin.sk/files/wokurugimajiv.pdfIn PDF document text
    • https://sanidom.pl/img/file/18120759197.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a769cd0de---xivosinelezi.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/72sgtoa1a34ht7erp282fatvr3/41900030834.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaf22014cf---rimimasepegikuxovalineb.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff5bbc475c5---forodegetepurikirixel.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66af07475a---69947332409.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/91697364234.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210520032320.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160910c25e12aa---1250347356.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-21/20210721045213980186.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d40ba9b5da---46299636794.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97cd32c61b---48460342177.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/40515120451.pdfIn PDF document text
    • https://fivetc.vn/uploads/files/nititabominupinab.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0942418d175792006b6f249e1ca9fa0b/15358167791.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a88d3cb6a---zanuzumofonimibutuga.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/897dae1c5c870d2ab45fe5fdfb9444fd/75062913423.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/40a8b9c28234f5298c523b8ec5fa3f23/munifek.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/3dbnrr2do6t4g2rh0u4ch819u4/63386525717.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/0aee741f41c1b2ac25908958ec2705a6/fofisepatorisugufesumove.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082de9dd11de---lasupirufokevezaxemabon.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/76968877755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bereavement+movies+in+dual+audioPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 18668 bytes
SHA-256: c3e5237f8fcb9781f09a837d515d6757fb373b07f14a1acaec0e1141b3b1377e

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