Malicious PDF — malware analysis report

Static analysis result for SHA-256 5953f484d0a160c2…

MALICIOUS

PDF

85.1 KB Created: 2021-03-28 06:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 033be2ef10fa35ab0b62d4c863603c46 SHA-1: c0c1539a7db9811f2d5ec630c27a173f9580f120 SHA-256: 5953f484d0a160c2d99ad85a1282723f951ce7a9338b56cc3c3bd09ddfec9829
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

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://jottigo.ru/123?utm_term=aruba+ap+315+firmware PDF link annotation
    • https://cdn.sqhk.co/vumivatuvi/gggjNoC/68176891028.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fc91ef323d68.pdfIn PDF document text
    • http://handler-autoscout24.com/puginarelixavikibekujetwbd9g.pdfIn PDF document text
    • http://seomagnat1.online/x-men_apocalypse_dublado_online_gratissi84s.pdfIn PDF document text
    • http://cabinetshq.xyz/855945449072ach.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5fe5897d92ff2.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/hu9uiar/nickelodeon_kart_racers_2_grand_prix_all_characters.pdfIn PDF document text
    • http://meriline.store/el_nombre_de_la_rosa_ver_pelicula_completa_en_espaolxc1dc.pdfIn PDF document text
    • http://lordtrans.ru/893479698424bjcj.pdfIn PDF document text
    • http://iglivesupportteam.com/damifinsbf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_602998ba91770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_605d0332486b2.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/ShfjhE2/blooms_today_customer_service.pdfIn PDF document text
    • http://salonapp.xyz/manualidades_navidea_cd_recicladosur6ym.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/VOjcqha/chicken_cry_at_night_no_reason.pdfIn PDF document text
    • http://dunizajo.66ghz.com/ruzavojotefilu.pdfIn PDF document text
    • https://cdn.sqhk.co/suzagofi/invShjg/music_bingo_near_me_tonight.pdfIn PDF document text
    • http://misstourist.info/tulokojinogoxazaxikuposp2s.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/gevPhb1/8725875864.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/gjhaibv/berlitz_english_course.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500001/normal_5fe75b3789b8c.pdfIn PDF document text
    • http://hookup750.website/xofapalenivsbv.pdfIn PDF document text
    • http:///ArubaInstant_Orion_6.3.1.1-4.0.0.0_xxxxIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://lometazojubusi.rf.gd/34872996412.pdfIn PDF document text
    • http://rorewoj.rf.gd/68607203998.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/aashiqui_2_movie_dialogue_free.pdfIn PDF document text
    • http://pulawev.epizy.com/connectwise_university_report_writer.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 2036 bytes
SHA-256: 62d28b66e193ed36fd42932682a3e439109505dbfa17a0c4c90bd3984285af40
font_01_sfnt_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 4984 bytes
SHA-256: 16ac847a0353aab5be3972eaa49bd2a5af3eb69d8f5c886e5cdd62b44f9660e8
font_02_sfnt_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 10240 bytes
SHA-256: ae2e4d414e9057e0417099e66e57e9251c212a1f451db6c2a23b0b1f624497a7
font_03_sfnt_off0001219f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219F 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_04_sfnt_off00013637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13637 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378