Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ed02834a5716c2…

MALICIOUS

PDF

85.7 KB Created: 2021-09-02 23:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5554a5cb9802dcd71db65a1b14eccb8a SHA-1: 197f4a0565b866609f8e98dd9ef84dd09c4a08d1 SHA-256: 73ed02834a5716c2754dbba9552be8efd9fed384b71d6c5a8a0ee370b371eb78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of multiple external links strongly suggests the document is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://crysiq.ru/uplcv?utm_term=benefits+of+professional+learning+communities+pdf PDF link annotation
    • https://ncsccalgary.com/userfiles/files/82010382980.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ef1634908---dunim.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/28349265547.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/2727454300.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/zusodomumabutukexe.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/dfbjsjnjjmnt76jqoapf9mstov/7742883622.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/30136517466.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/24977615399.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/zelozefig.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/55f4089cdc59c556d1e64a6f9cbf783d/51562206166.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/isolukoxan.pdfIn PDF document text
    • http://reylab.com/userfiles/file/penidej.pdfIn PDF document text
    • https://hgb.se/filer/file/15739883910.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcc06377de---zamesobisomev.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160f14e8032cff---kejagu.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/da124ab40f8c499a54541f04008382b8/zawozipabogikolozewega.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e9f6f3ea9e20c8a57f92b8e6ec62d55f/kilasisufagesutovox.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/kokivab.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/i25h39u9lfc5m885ldhdhp2bbm/4317836479.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050221441173499.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/babiliwute.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_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 17264 bytes
SHA-256: c46b534e244c8e4b10bf7cff9d007334f43235f41c88dd55f0c4ea9c3330e49d
font_01_sfnt_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 11116 bytes
SHA-256: 17c1074c5cc12c1f795b0f0e720fa5a2c209ac885b572e407d0887d5244b0308

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