Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2c3793422a67bd…

MALICIOUS

PDF

77.9 KB Created: 2021-09-21 00:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 038d88c4b4468280e5f31bcdb2976e3d SHA-1: 3dc3c630f65107d778dfc3b07bcd5a7a638ee069 SHA-256: ad2c3793422a67bde24058550e01b5fe4f78a79a7860e89712ed485c20969d58
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 disposable domains, suggesting a link farm designed to distribute malware or conduct phishing attacks. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://allytemp.ru/uplcv?utm_term=pokemon+go+latest+mod+apk PDF link annotation
    • http://orderbestwings.com/uploads/files/penidajifelaxigek.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/85998376807.pdfIn PDF document text
    • https://klaipeda.cvzona.lt/resources/img/files/ronapib.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1613de945c55e1---26981723485.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/tikuj.pdfIn PDF document text
    • http://perksys.com/userfiles/file/vinorul.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/moniguzuvip.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/parifebufemomatapaw.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/1292928236.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/35207352184.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/80658060415.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/39373458369.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/nazegetovi.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/jotupilozurapuk.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/nisokozofejugavimaziluva.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/bojifup.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/rijeritir.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/vedetobamebif.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d67ae2ae7cbddb71abc55b2c82fcdc7d/vitinabilanijikavolureniv.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/sawedorij.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/65440012687.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/244625525.pdfIn PDF document text
    • 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_off0000ca5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5C 10636 bytes
SHA-256: 0b3e7229e1f61fad3619ff94649cac47d9112874f4e7cb8c237b2a899a0ce818
font_01_sfnt_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 18176 bytes
SHA-256: 7525047298adffcd7eeec4907bfb12387ac42aa50c7c17223aa723f974fbea8b

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