Malicious PDF — malware analysis report

Static analysis result for SHA-256 eace9380ba5aeb6b…

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 11:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a2dd5fa03900a10b93bbb9a5dd6c07b8 SHA-1: 75af0b0f5dd22cf9371ae530735b47974b447171 SHA-256: eace9380ba5aeb6bd0571c835b7ce9da970c473e43d87f78805fef58608d4d86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or other potentially disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the 'link farm' heuristic indicate an attempt to leverage external resources for malicious purposes, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://khodahoanglang.com/admin/webroot/upload/image/files/44654743411.pdf In PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/vagabigebu.pdfIn PDF document text
    • http://ipublicity.cz/data/file/82964225075.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/iloct1caniojregra67n5g7dlb/niseninalelaxap.pdfIn PDF document text
    • http://autovoda.ru/upload/files/35019043096.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gf2br0c1daduev1gjd3bqkca47/45795405844.pdfIn PDF document text
    • http://bostonmentors.com/userfiles/file/66141652988.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13947d44c---16242367705.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/52722130460.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/26177095227.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/5283228595.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a2b15de98---jodadujifa.pdfIn PDF document text
    • http://waypl.pl/upload/File/fajenuxazoberezuteti.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/ludobodupixogezitajevudan.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sarusifotufuzowolebopo.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/97461275291.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2sb6m4ebe9rgjnhbf558vntuk9/99029097533.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/slv10inj92vnvb9j8rkngd2d1j/51784177267.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/35684441887.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc32ccf8e2---17035197061.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf90811610f---tetiwewamevefag.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/munetipakobel.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c57bb90792---nofira.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608056f305c73---54394161176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+roast+pheasant+in+the+ovenPDF 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://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_off0000df29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 17548 bytes
SHA-256: d13274f9ed5f99f481abd8c611cf7b671167e2c2abc6e0c96f02e08a41455d51
font_02_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 10444 bytes
SHA-256: e8269355927eaa2fd5572d6ed17bdc06fad19b4b732b5a8d4b30268818152a65

Open this report in the interactive analyzer, or submit your own file for analysis.