Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0e9707d91c672…

MALICIOUS

PDF

69.7 KB Created: 2021-10-01 07:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 39108987222a10d718f358dccd3d4e97 SHA-1: 3301c3104e01199f4478fb22ecaeebfc2a68e8b4 SHA-256: 5cd0e9707d91c67229a183d57d0b43507a3cb2c08d0594a648311fbd286d17af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm hosted on various domains, with a high number of distinct hosts and links per host, indicating a coordinated effort to distribute malicious content. The presence of external URIs and the link farm structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://pasationtravellers.com/root/FCKeditor/file/tisozesomopi.pdf In PDF document text
    • http://martom24.pl/martom/userfiles/file/loriliro.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/17922662416.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/sogak.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/74069486621.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/268253450.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/26529604582.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///kukivixijikaxa.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/bijozuxuv.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/15896797499.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614147f34d49c---1074049575.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/75784035650.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/tuvesaso.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/10763027475.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/39646851543.pdfIn PDF document text
    • http://air-ned.com/uploads/files/55960802310.pdfIn PDF document text
    • https://chineseclothingonline.com/File/85407791589.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/wirupezavofu.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/49788190610.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6ca8f15cc---fabupekidikibigazedijaf.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/87399579598.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/26825336722.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/22325126328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=programas+wifi+gratis+androidPDF 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_off0000ae65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE65 16720 bytes
SHA-256: e12990047ecd01338b09cdca8a302418ee95e164dba9f42f9d56aafa6d33a929
font_01_sfnt_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 10604 bytes
SHA-256: cdcaf4dff175a0f91c5ba4c16d5b9aec2a1125549aa23019ebd43c40e49b588f
font_02_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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