Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31c617d4fcbc012…

MALICIOUS

PDF

71.9 KB Created: 2021-03-06 11:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1956c011126f57892b4bc1695e4adea1 SHA-1: e15385398cbb200ce7c4798f06ffb31d9e4d113e SHA-256: f31c617d4fcbc0123906faee72f0b348713a2cdfc66270714785d02527e62522
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dafemum.ru/wix?keyword=base.pbp+file+download In PDF document text
    • https://cdn.sqhk.co/xoxamomajil/3jhZUje/code_text_editor_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/hc3hfcj/vr_games_pc_2020.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/jubowiwigaxud_voziwuwul_xegakamevolir.pdfIn PDF document text
    • https://funitaba.weebly.com/uploads/1/3/1/3/131380773/xafon.pdfIn PDF document text
    • https://pisusafinado.weebly.com/uploads/1/3/4/3/134363103/1270520.pdfIn PDF document text
    • https://butiriretife.weebly.com/uploads/1/3/2/6/132681404/mijej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_6ffd376a25bc4f81b139628a27c612c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fifomi/welez.pdfIn PDF document text
    • http://lekozuni.epizy.com/medical_device_complaint_handling_procedure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/broadsheet_perth_new_restaurants.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/jawofela.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/39017883758.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/zavavosunuvevujirub.pdfIn PDF document text
    • http://lolekubem.epizy.com/arris_router_nvg468mq_manual.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_bf07e95c7a6642e89be411d24895321a.pdf?index=trueIn PDF document text
    • http://vepibali.rf.gd/jibegimojigom.pdfIn PDF document text
    • http://zusobudem.epizy.com/10622431315.pdfIn PDF document text
    • http://kogejikez.epizy.com/chick_fil_a_menu_nutrition_info.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/wezoz.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/tascam_488_mkii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/catalogue_de_formation_campus_france_licence.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/quantum_chemistry_levine_5th_edition_solution_manual.pdfIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_bde93051e03c478698319b91ac74e538.pdf?index=trueIn 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_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 5252 bytes
SHA-256: 83f06cceccde8f50646abf914b919293d443d96ec7df058c2ffa247545debbd5
font_01_sfnt_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 10212 bytes
SHA-256: 737f7eb6f8a9452a4902759b6e7a804a11fe951f673fcc3937e2a96096aaa3a9