Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45165dc4a859cbb…

MALICIOUS

PDF

70.7 KB Created: 2021-05-14 04:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d687f774e3094d04200abf0f1251551c SHA-1: 706b6f3ae4ec54f4b79af17e92a79de77348aa66 SHA-256: b45165dc4a859cbb492f69517fe24edfcd20c242d923ee9995c8eda705604842
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • 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 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://soxebez.ru/strik?utm_term=msi+a68hm-e33+v2+chipset+driver PDF link annotation
    • http://fegebekuxew.22web.org/bfa_alchemy_guide.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/rulanuxomubem.pdfIn PDF document text
    • https://jezuvafu.weebly.com/uploads/1/3/5/3/135348480/71a9470508.pdfIn PDF document text
    • http://gnatural.space/bahara_song_djmaza85ddm.pdfIn PDF document text
    • https://didunomupipopad.weebly.com/uploads/1/3/1/4/131438203/situl-gewudigikexa.pdfIn PDF document text
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/ea0541a674cea2d.pdfIn PDF document text
    • https://tafanoxuxirugo.weebly.com/uploads/1/3/5/3/135327873/luwexab.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/13dd11.pdfIn PDF document text
    • https://xexasatokotubeg.weebly.com/uploads/1/3/4/3/134354060/kutudegofopes.pdfIn PDF document text
    • https://lobududovidaxu.weebly.com/uploads/1/3/3/9/133997350/9875779.pdfIn PDF document text
    • http://copyrighthelpcentral.com/6374308573847blk.pdfIn PDF document text
    • http://giveaway2020.info/el_ser_uno_1_los_arcanos_de_thoth4nu6g.pdfIn PDF document text
    • http://card2card-perevod24.site/manu_dharma_shastra_in_telugu_download15bg7.pdfIn PDF document text
    • http://loduxoxoba.22web.org/pentair_easy_touch_outdoor_control_panel_manual.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/alaipayuthey_songs_mass_tamizhangyd8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/90207033205.pdfIn PDF document text
    • http://vowiguwoku.rf.gd/vikusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84cf0b6-1fa8-47ee-96cc-c54b6e56cd5e/is_the_maze_runner_a_childrens_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3586ae1d-64ec-49a1-839a-5844d5c1086b/piregurarup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dd409a-969e-443b-aabd-ec3aaab8d975/56780689891.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/blur_images_background_apk.pdfIn PDF document text
    • http://nafaloputazesoj.rf.gd/defamiwolukudajodufimifop.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/college_admission_essay_format_mla.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/age_of_sigmar_releases.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DE 6024 bytes
SHA-256: e06493ce71cad70999d0e2eb86aa0fb7cd41eccc2b67e9436e00011303b15218
font_01_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 11616 bytes
SHA-256: 9b1b9abb8dff2437229dab5faff7cc2131bf750c6d46dd42c59abf1f2ed97b80