Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a9bbc38ccbcfea…

MALICIOUS

PDF

66.5 KB Created: 2021-09-17 17:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e524699ec9be3e3d92c2f4d0ffc9b66 SHA-1: 12205a2f86059df41a9c738599e609fed5336973 SHA-256: 34a9bbc38ccbcfeadb2c87b7d98baca955509dd7352d5b30c4214f321b687445
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured as link farms or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5194

Heuristics 4

  • 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
  • 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://medvor.ru/uplcv?utm_term=craft+vegas+crafting+and+building
    • https://karaari.leaddeehub.com/userfiles/files/wusivade.pdf
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/lesalenafosusif.pdf
    • https://035620126.tw/upload/greenkitchen/files/27449549547.pdf
    • http://falcon.dk/sites/default/files/webfm/papixi.pdf
    • http://stellamaris.cz/userfiles/fusasifuti.pdf
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/18750672522.pdf
    • http://krr-nfe.com/suratnfe/UserFiles/File/24661454983.pdf
    • http://globalbando.com/DATA/upload/files/202109130207544194.pdf
    • http://deurenhanger.nl/userfiles/file/guriwabinebuvojuroja.pdf
    • http://ks-system.co.uk/ckfinder/userfiles/files/69416474520.pdf
    • http://sandlnae.com/data/editor/file/dojoputekudit.pdf
    • http://www.rsvpcatering-ar.com/files/imagesfile/dopavuwajetodoniz.pdf
    • https://spa-salon.ru/ckfinder/userfiles/files/43943010303.pdf
    • https://tomclarkvoiceovers.com/userfiles/files/govumutonibege.pdf
    • https://etest.vn/app/webroot/uploads/files/65094546259.pdf
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/poropakepekulogazesax.pdf
    • http://erodiertechnik-wenzel.de/userfiles/file/mepajenegepa.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614225de66323---rukuwutudamopitaz.pdf
    • https://edinburghpools.com/contents/files/pifozejase.pdf
    • http://www.pilartangguh.com/file/21840545699.pdf
    • http://rrarental.org/upload/file/83681537037.pdf
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/mimuribiditijinusu.pdf
    • http://trieuduong.com/images/Download/22401715793.pdf
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/gibivex.pdf
    • http://sukhonthip.com/file_media/file_image/file/86597296532.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5e6da5eb---14878784991.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce32.bin
96e1b01929626f4d2aeaee2811c2de80ab6b44643e4293e04301209184ec5401
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE32 16712 bytes