Malicious PDF — malware analysis report

Static analysis result for SHA-256 369bc57173870dd5…

MALICIOUS

PDF

71.7 KB Created: 2021-09-17 13:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 829d6d3d991778413689ed9ee57d621d SHA-1: 27e4d46b104738cf02dd6b61fa65beb9972449b4 SHA-256: 369bc57173870dd5a04bd0d5e1b554092d11792a2a2fb139eb8a9be5a935bf86
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier flagged it with high confidence. The PDF contains embedded JavaScript and a large number of external URIs pointing to disposable domains, indicating a phishing or malware distribution attempt. The presence of embedded JavaScript suggests it may be used to exploit vulnerabilities or redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.electricman.in/demo/frontend/web/uploads/files/gabasutekesutajivadite.pdf In PDF document text
    • http://lyzjkgm.com/d/files/24764297679.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/minexavupijawal.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/57472501987.pdfIn PDF document text
    • http://bifruit.mk/ckfinder/userfiles/files/rejisojidoxozoti.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/xotajegasawim.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/2009369902.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/fozuzonamoxosomi.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/lapin.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/jagun.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/84529564695.pdfIn PDF document text
    • http://boldogelet.hu/media/88490248445.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2109152012252260564b0nuu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/72ad3e19a7d6a1cfde61a4a1280a7b90/wekatelofitos.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/xeseditewip.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/74706258926.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/71895983901.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/tovevoka.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/vusixijovipolupidaxadag.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409dade0725---kejifekositit.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/faganujezegonub.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/11898631828.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/36689867179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+cast+of+zombielandPDF 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_off0000b899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB899 15632 bytes
SHA-256: 526e4e54e094bd0f9ba13ed0a509314cbca4e607656643ab74853745000f9893
font_01_sfnt_off0000e0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B2 10804 bytes
SHA-256: a8b207dcbd706be874113c0a49e16e19e3529e36b08c5fe1e556e8b68ceb0962
font_02_sfnt_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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