Malicious PDF — malware analysis report

Static analysis result for SHA-256 70aa946f8ff85bf2…

MALICIOUS

PDF

83.1 KB Created: 2021-09-11 07:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 83f406ab70aa69e598c92ad8a20405b7 SHA-1: d0fb94d10aedaa7eb4630b281c861a3a7c921655 SHA-256: 70aa946f8ff85bf2c563b7e412bedea3baf684604c09a2d5b137d2448019b074
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=facon+font+apk PDF link annotation
    • http://gdwtechnology.com/fckeditor/file/24394473347.pdfIn PDF document text
    • https://cplastik.net/data/cms/file/sujoto.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/jejuxelugozegutisugalano.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/47384367737.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/taximepojafijejiwewepo.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/xamisanividijulu.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/63821094486.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/18581585975.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/woputegabunadogaxuvu.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210902184522.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/kesewowajadowedifafefiri.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/zegaloxijif.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/xigejarakaxofaligo.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/genarusuxusigunobinatij.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/dupoloja.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/07/vopadutejilo.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/pudotabi.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210902_4299083DAD484297.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/43076349090.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/gaselewajudo.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/19826842281.pdfIn PDF document text
    • http://surausa.com/uploads/files/39022976939.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/denuxipuvadamitizarelobin.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/25395480418.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/90798210904.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356cf25a208---tatofebasidaloda.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_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10004 bytes
SHA-256: 6ec9007b94ae2b138a777dd20f6f4c73eda58db29ccfb34505d1eaba656f6fd8
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D74 18500 bytes
SHA-256: f215d4d160eac4666d2384ead2cda98e1e32382778c4c20720dca0913f53df45