Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b7af6fe297a5b4…

MALICIOUS

PDF

83.0 KB Created: 2021-04-04 22:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46fcf15a64ae5caf19ab8e530d1579af SHA-1: c56ae2a53b9b2cd999785d89604b002be157390a SHA-256: 20b7af6fe297a5b411c967c34d9399b0bb597158e9a42eb96ad2e6a4c455e0f1
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 0.9990

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://xezojetit.ru/wix?keyword=green+dragon+guide+osrs PDF link annotation
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/20533c8386.pdfIn PDF document text
    • http://natural-shop.info/navigation_drawer_android_developer_blogx8ppp.pdfIn PDF document text
    • http://mixed-rootwork.com/turanokmg2oy.pdfIn PDF document text
    • http://basiditdcf.space/how_to_look_at_a_star_through_a_telescopeo9meg.pdfIn PDF document text
    • http://wordsideget.top/mastering_javascript_object-oriented_programming_download1bi63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_601bab0a3fcfc.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/1O8DqzK/into_mirror_mod_apk_v1._0._11._0.pdfIn PDF document text
    • http://fastpysystem.online/97177231050uwcyn.pdfIn PDF document text
    • http://wekeb.space/gatogagumer0cyrr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488339/normal_5feec530478fd.pdfIn PDF document text
    • http://good-production16.site/bti_unix_command_line_cheat_sheetowl40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_6049c3eef1e11.pdfIn PDF document text
    • http://laketofetujeso.medianewsonline.com/simon_ielts_task_2.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/athens_metro_map.pdfIn PDF document text
    • https://rusuligoxajikug.weebly.com/uploads/1/3/4/3/134399392/pabidowupo.pdfIn PDF document text
    • http://baby-slings.ru/emotions_worksheet_for_high_school_studentsrlpu8.pdfIn PDF document text
    • http://mizifasurogik.mywebcommunity.org/52552474782.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/3494243.pdfIn PDF document text
    • https://binemipo.weebly.com/uploads/1/3/0/8/130874238/2699625.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/jpicNa1/sirona_dental_inc.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/dJnVgjd/angry_fruits_apk_download_for_pc.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/6143443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_60129504b223f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fikelamizogu.myartsonline.com/69996816955.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 4792 bytes
SHA-256: dfd8a1448a7421d88515198bd25bd96fa25f7e195ab6195265e4b79550349195
font_01_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 10692 bytes
SHA-256: b0e41776c3bc102e86bfc69327ccc7418975d45dd70876054b155fd240f11d5c
font_02_sfnt_off00012f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F11 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f