Malicious PDF — malware analysis report

Static analysis result for SHA-256 245112f9109138c3…

MALICIOUS

PDF

75.7 KB Created: 2021-03-07 22:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eb07f6b65248293f9b0b796c0aebc9e9 SHA-1: 2b0cf5de9a4e4eda101f368ad248d09bd92f51d2 SHA-256: 245112f9109138c3bdd03c4fb0a1e55ddf413dd25c55b215b61d33fc9c46934f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=young+living+price+per+drop PDF link annotation
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/kuzataw.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxofepure/ihWgdry/51020083231.pdfIn PDF document text
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/2cbf1a656cdc18.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/hghjdig/stickman_dismounting_2._1_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/vgpiijj/psycho_bunny_polo_big_and_tall.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/n4whiha/crash_test_car_racing_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/S6Oijid/76216459480.pdfIn PDF document text
    • https://dosupara.weebly.com/uploads/1/3/1/3/131380612/10b2f44dcf9ef68.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/ibaiehb/teravab.pdfIn PDF document text
    • https://cdn.sqhk.co/datisafapuv/fxhiMgh/best_live_wallpapers_for_pc_4k.pdfIn PDF document text
    • https://kenojulovananav.weebly.com/uploads/1/3/4/0/134016885/6718009.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/literary_elements_worksheet.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/buletom.pdfIn PDF document text
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/libex.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/14892712003.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_80612df8bd954a218fbbb1e7b1c24348.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/balolotarixalekebosip.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/microsoft_powerpoint_2010_presentation_templates.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_fecaa170268d4377bac76d200610f752.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_7ce0eaf9c039485ea5e2ab0c68aae891.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_6716f0fdc23d44759f251884942ff1d4.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 4872 bytes
SHA-256: 9fba4b800c2ae6917342f35d7cbbcb92b64f3bf50bab312878e35c1c5b1ea72b
font_01_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 10764 bytes
SHA-256: 7935282f843ae3c2acb53b71e1717bbb08c84bb1e10eca5ddeac4c5642332416