Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fbec8c0f6430ee…

MALICIOUS

PDF

72.6 KB Created: 2021-04-05 16:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 03d368e4f2a2d8139130280a3e2102eb SHA-1: 4db144294941ee91461f8f2c4f5b6240501f684d SHA-256: 92fbec8c0f6430eeb59dc2da2538198b9385cabf23b0754be38bf4a5463df08d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/wix?keyword=lego+mtt+bricklink PDF link annotation
    • http://livecopyrightverification.com/best_sales_books_2020_ukkx6tx.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/iibieib/the_last_stand_update_patch_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gchi3Db/the_crossings_golf_course_louisville_ky.pdfIn PDF document text
    • http://bellissimo.online/pilirewajogtb1u.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/higiene_seguridad_y_calidad_de_vida_en_el_trabajo.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/cva_bleeding_adalah.pdfIn PDF document text
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/6584218.pdfIn PDF document text
    • https://cdn.sqhk.co/zejewade/jhCcru6/fall_gang_3d_download.pdfIn PDF document text
    • http://fakts.design/94823472658fm82x.pdfIn PDF document text
    • https://xisegebimir.weebly.com/uploads/1/3/4/3/134340076/d5e86a9da08.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/jgFgegd/ten_thousand_the_dice_game.pdfIn PDF document text
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/xiwadejazuzez.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/sehcXhe/descargar_real_racing_3_mod_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/dgjicid/space_bubble_shooter_free_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogoxuf.atwebpages.com/kebidilolupoxurew.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/petrolimex_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/21131633590.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/metadojalekavu.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/dictionary_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/87561147954.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/osaka_subway_map.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/mezatulunojasuxawire.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
    • 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_off0000c990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC990 4876 bytes
SHA-256: 171e49b2f5caa3cc08860a6006a2b25162501eb3fd99d6661d3c1b432fe1543f
font_01_sfnt_off0000da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 11060 bytes
SHA-256: 51d3d0754cbcd87444b1f636eb982a696536f05bad60af6d73ddde9c300486d2
font_02_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 16176 bytes
SHA-256: 5c0096e07997531578d110f72cc41a4d4d38e64c80441005109e437c93df282f