Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dd4da9883997c5…

MALICIOUS

PDF

81.2 KB Created: 2021-09-24 06:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fba8f0f1433e73bfe7024b4a7ef8a5a7 SHA-1: eee60e46ef26823c43b1a07b83358c5ce0272d64 SHA-256: 60dd4da9883997c59af1b4d4be8028587b99e93219f39f7edb0851b0e3d33e91
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external links, many pointing to potentially disposable domains, suggests a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate it's designed to lead users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jiendurancecoaching.com/ckfinder/userfiles/files/niwedivugavimilopudu.pdf In PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/38625675266.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/75792261467.pdfIn PDF document text
    • http://ingore.cn/upload/files/fixunukefopurirenezox.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/56216558672.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/zopijapan.pdfIn PDF document text
    • http://ave-france.com/pics/files/kuvesufebezilolaxako.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/1384971907.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/84125577668.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/80978207201.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/gomomimemiminuxuba.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/47034008145.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/monawuk.pdfIn PDF document text
    • http://ombs.ru/uploads/files/15589692029.pdfIn PDF document text
    • https://techlan.pl/files/file/winokakav.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/vudejo.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/zatobusale.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fecf4bda8e---telesa.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/56514049800.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614660dc21b3c---zudupopamivikegagerim.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/11372431513.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/wogexulonabizigos.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/35802803727.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=find+out+power+supply+wattagePDF 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_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 10844 bytes
SHA-256: 382d2bb22f053e7ceb8ca6cba864875768540f93399ef78fa883e7c976915e7e
font_02_sfnt_off00010b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6C 16992 bytes
SHA-256: 75f4f3b250e4e728a53efbad037b0ea0069b523594827df1e86a5133f080c162

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