Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c6391910644bb5…

MALICIOUS

PDF

64.5 KB Created: 2021-09-10 06:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a3212a9b2dae5c294746b55781244d09 SHA-1: 6abcae1bd4b1478f1c32b04c40e8acb002a5375a SHA-256: 82c6391910644bb566ef5b4b3ae3944ce7f4811c7f35ea97602798c99b959e84
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 5

  • 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
  • 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://burlingame.com/wysiwygfiles/file/86597493224.pdf In PDF document text
    • https://ddnepal.com/assets/userfiles/files/govejemabevidisukalomi.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/wapoxinojajilidetipom.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/madopazabemewevozo.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/nubogekepusakuxure.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/92796399966.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16131ac315cc05---66668184904.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/xowogelotigonepewusosi.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/88283575685.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/24542803716.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/nokumurimoxon.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/54031427488.pdfIn PDF document text
    • https://partnermind.cz/images/files/90167993768.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ef9350358---27848614510.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/tejetebaj.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/7941650064.pdfIn PDF document text
    • http://baoveantam.org/upload/files/82565961967.pdfIn PDF document text
    • http://poliinc.com/upload/files/79900401270.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/bozewumajevadekez.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/fikabelodugub.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f07f16b6a7---14417242729.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/70604594102.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/8184260602.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/64701904304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=stomach+parts+namePDF 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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 10576 bytes
SHA-256: 1d1ef2a624a9555800d0774979bfac58b78e74f0d41360ebbf3387a984934ccd

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