Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f53e8f2e8d42a8…

MALICIOUS

PDF

74.0 KB Created: 2021-10-09 10:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 84781700f43e2f32ac64c2148fef4e3e SHA-1: bc894225eb8dc32b7aa25bbc421be0bc61be4861 SHA-256: e7f53e8f2e8d42a8d1059b4c6219e332b0686a2727c7b80e1d3830ff428a2040
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded links pointing to various PDF files hosted on different domains, many of which are unknown or potentially disposable. This suggests a link farm designed to obscure the ultimate destination or to distribute a payload through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://jawarakreasi.com/file/83227940774.pdf In PDF document text
    • http://around-sicily.net/userfiles/file/51781728898.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/55753784597.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/dezuzapowelapepupaferi.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/vibulugozomejepepawewe.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/90592924764.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/firasularonobe.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/40243242300.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465276a0338---60741767871.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/68546180920.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/nanetitegasavotizabimo.pdfIn PDF document text
    • https://nocrime.cntwn.org/ckfinder/userfiles/files/muxabikag.pdfIn PDF document text
    • https://ip-pharma.net/data/files/47106155095.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/58985010980.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/tomekaxarojimanotegufaj.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/miradoforirezulisu.pdfIn PDF document text
    • https://metagrhyd.com/infopub/pub/file/82320164317.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/53426388567.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/40778756367.pdfIn PDF document text
    • http://lj-group.cn/upload/files/26041165826.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/83724937853.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/dijedalubof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=print+pdf+multiple+pages+per+sheet+macPDF 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_off0000bc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC11 11048 bytes
SHA-256: 2d24f4d652431e2c958ee065448d093b17e92df8f840ed604870504cdc868f2b
font_01_sfnt_off0000d55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 17232 bytes
SHA-256: e0cdd744bf22ddd3ff8d3b72d4a9bcf10965d1cde5282aa1510c5908f5721a47

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