Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd56b245b117587…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 08:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ba80d71f02f9fc5003b0d501a0eab392 SHA-1: 6721fa0dbce2e10ffaa18272901788815356e0c3 SHA-256: 0bd56b245b117587aae083608e8aca9222be0806e711220e4ed7b9b7d26539c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution tool. It contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a link farm or redirection mechanism. The PDF's structure and the presence of external URIs strongly suggest an attempt to lure users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://techielingo.com/fck_uploads/files/29188015829.pdf In PDF document text
    • http://nakajima-ya.com/upload/save_image/files/46960464443.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/mujijoxigaxupifexipav.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/zifujagifawon.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/guriwanegudepoxitatodiki.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/50643482866.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/37495575657.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/jusokaxosisabojozefo.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/54710217609.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/vapunakidajusorexizo.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210903073714.pdfIn PDF document text
    • https://hoalavender.net/upload/files/12256315910.pdfIn PDF document text
    • http://artdental.hu/editor_up/bebefelijudelide.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/29492811793.pdfIn PDF document text
    • http://bankerz.in/qpic/files/biwibedaliletevaga.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/8b26861fc5d97daf2bb48c7f484e0dc0/jefofelopezonadasugasofu.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/masagimivapinujodap.pdfIn PDF document text
    • https://podimercrm.com/img/files/tijiwoxajes.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e014d8a383---misajuvemiku.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/68977448191.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///10701029412.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/769059346.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/97210707250.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/xaxevezagejurakedaxo.pdfIn PDF document text
    • https://signika.pl/Upload/file/zupusonagopelumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+change+phone+storagePDF 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_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 10592 bytes
SHA-256: d409fff12685e1b982a936c8087fbca94578021498762faddc81ae129d8b059c
font_01_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 17324 bytes
SHA-256: a727465d763e0ccb60bba3e402d1eea5e4b51c68f8093a99eb5bbcdabb55689e