Malicious PDF — malware analysis report

Static analysis result for SHA-256 7492cfb776975a06…

MALICIOUS

PDF

81.7 KB Created: 2021-09-23 14:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f30b4d6d398ccb6b8dffda6d491b4dd0 SHA-1: bb51a832f5faedc674eb90a4b31b0e5852173022 SHA-256: 7492cfb776975a061e9aa0a3ba98e127ad86f0428828d8b220558857b7672e70
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm or SEO manipulation tactic. The presence of external URIs and a high number of distinct hosts associated with these links further supports this. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user-facing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://ahjygjg.com/upload_fck/file/2021-9-11/20210911005150332319.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426d60247a6---90046025161.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/9f6effb0cfdd1005b2e16a9a47d09a2d/12988947196.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/60560367139.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/kojodasilusekad.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/53240120668.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/dumetefigiw.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161488d4ea83cc---rikuxirobawemosuxakip.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/73045086776.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/22716446662.pdfIn PDF document text
    • https://skl68n15g-n2ox.com/contents/files/lotamavozuwupefa.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/xaxin.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/30639585676.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/c3ba798256e4f55e7fc78c4ca634b15d/xiwibejixubuwa.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/rutevi.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/xasegozogedurigiwowuj.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/92509688962.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/pasixosukusilone.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614887773f052---91611690149.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/46542942768.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/monunusodasiju.pdfIn PDF document text
    • https://norservis.com/files/files/powuzepuxa.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/56156645258.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/bamemodivavapopuwuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+live+sports+apps+for+android+tv+boxPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 10852 bytes
SHA-256: 30aa8d19d6bb08e6b306f8a191afe9b10271c844c58c43ac6cc791357150e14e
font_01_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 17576 bytes
SHA-256: bcb78383094d94051df8de6fd10fe9a59437a55e847b3de700b107dff469fb6b
font_02_sfnt_off000120c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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