Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35c4633ddddb5a4…

MALICIOUS

PDF

89.0 KB Created: 2021-06-06 14:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cec5827f72dfa14820db2953eff1da1c SHA-1: b67479139a5e874e67d6f575c18e943d6e592aba SHA-256: b35c4633ddddb5a4923c2895bae591a6da08e0938215adf13978b597983ff732
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous embedded links, many pointing to disposable domains and potentially serving as a link farm to distribute malware or conduct phishing. The presence of external URIs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/pbw?utm_term=why+does+my+toddlers+urine+smell+like+maple+syrup PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370294/normal_6001396a9cb90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_605f4b01c32b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_6047f1106afe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496571/normal_5fd98bb501cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5fd795849ec2a.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://risuxujuvu.pbworks.com/f/mortal_kombat_armageddon_apk_download_for_android.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/f/soxavuwosur.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/33408185963.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/39001573128.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/w/file/fetch/144630642/libro_la_dieta_del_metabolismo_acelerado_haylie_pomroy_descargar_gratis.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/f/throne_of_glass_hardcover_book_set.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/w/file/fetch/144656640/suxoguva.pdfIn PDF document text
    • http://labidan.pbworks.com/w/file/fetch/144472647/dibiwesiwodago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882b19d3-467b-4536-99b6-f2a9162e80d4/pumalexelatipabemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ae5a24-e07e-49d0-b225-6b208a059a8c/what_do_the_prius_warning_lights_mean.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144621435/comment_dire_quallah_taide_en_arabe.pdfIn PDF document text
    • http://buluwogot.pbworks.com/f/tegesakitakinalilepewimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c3bf82-570e-42ae-8f33-f33bb050c7ff/lego_ninjago_cartoon_network_asia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb53240a-2ba7-4ea6-8326-985afe53fdae/is_doing_mba_worth_it_quora.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144625917/la_dodgers_symbol_font.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_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 5260 bytes
SHA-256: dd83021e825fdb8ea8c5a5005cf32e20381c7ce205542cfe5c3b785787a9df2f
font_01_sfnt_off0001208d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208D 11736 bytes
SHA-256: 2c711abc7278c97a693d279bd2693d7ae2656ccf2df4582daa12eb304de328e0
font_02_sfnt_off00014831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14831 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.