Malicious PDF — malware analysis report

Static analysis result for SHA-256 6976e5d9616604b4…

MALICIOUS

PDF

67.0 KB Created: 2021-05-14 04:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09f3b41662cb4037a9140a22de273071 SHA-1: 26a3d9584dee25a8ebd67fe97e870f599b07becc SHA-256: 6976e5d9616604b4809228eaff55c2908fc1620ca2f1b8e5f1ce93aec3e7bbdd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=kubota+bx2370+weight PDF link annotation
    • http://creamwalls.space/kefidaberimanovedaja3kwmg.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/GRigyge/dinosaur_simulator_codes_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/MVibM7W/mcd_number_near_me.pdfIn PDF document text
    • http://erse.xyz/detezoxazerel36jq3.pdfIn PDF document text
    • http://sethel.xyz/all_the_fun_of_the_fair_sayingaec8i.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/heqiehh/jesokafosetokawu.pdfIn PDF document text
    • http://legendbilisim.com/31632522601g0rj8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411479/normal_5fe3652e41d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/ccgdkBL/94919122320.pdfIn PDF document text
    • http://mnatural.space/feniwisukodesugekar5dkxd.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/jji5jbJ/road_trip_movie_download_480p.pdfIn PDF document text
    • https://cdn.sqhk.co/lunilageruvu/hDGKjb9/template_for_project_timeline_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402949/normal_5fddb3ef8e4a3.pdfIn PDF document text
    • http://zebrait.fun/hymne_a_l_amour_sheet_music_piano9inme.pdfIn PDF document text
    • http://academic-club.ru/what_the_meaning_of_life_insurancepw6eq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467007/normal_604e0a715ab60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_6008dfab4917e.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/jiBpjgX/kedapiradalifukede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fd322d435d4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F5 5428 bytes
SHA-256: 66fb7916a824d432f8bb74a12302296df5a03be2693baa12588a325b2de900c6
font_01_sfnt_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 10456 bytes
SHA-256: 894bf0d1e50b7a90d9fef55075da2c6869cdd71bade7b1b44ceee2cbdbd28a02