Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae103155ccc246b…

MALICIOUS

PDF

83.3 KB Created: 2021-05-14 07:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 20cae11f98834db1f205fb816a48c7f6 SHA-1: 514f844821886c6b31c3d7ef5f0faab88c5c9876 SHA-256: dae103155ccc246b4d42f18fa419ae8fdca3f941d4d4c07ddcdfc3d6856d8856
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=is+nessun+dorma+hard+to+sing PDF link annotation
    • http://supsun-aero.com/28010437907k8l18.pdfIn PDF document text
    • http://thelait.pro/32794444096sgz2w.pdfIn PDF document text
    • http://varakeno.iblogger.org/article_35a_in_english.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/how_to_interpret_biochemistry_results.pdfIn PDF document text
    • https://lefusavuforuv.weebly.com/uploads/1/3/4/4/134490278/miwaxi.pdfIn PDF document text
    • https://giwitororozesal.weebly.com/uploads/1/3/4/6/134652081/begomegan.pdfIn PDF document text
    • http://wei-nmvc.com/majimuzelotosewotek08y7.pdfIn PDF document text
    • http://onesmall.space/fancy_names_for_chocolate_dessertsr9ct9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da8e9da-a54a-46f2-8fa0-495a170edf00/elite_3.2_qt_digital_air_fryer_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08e376d-afc8-4f39-a0b9-1a451f80598e/1333977654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8fa0f5-4153-45f6-b38c-84e3ab157fae/sheikh_mishary_rashid_alafasy_surah_mulk_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/wetixirasopojulomomi.pdfIn PDF document text
    • http://joxisuzu.rf.gd/silent_hunter_iii_commander.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c937ea-805f-4798-bc53-a1c76e58ea30/awakened_house_of_night_free_download.pdfIn PDF document text
    • http://wupuwijekoja.rf.gd/arte_barocca.pdfIn PDF document text
    • http://kageditivumimor.onlinewebshop.net/13001039871.pdfIn PDF document text
    • http://duguferebijojo.rf.gd/jain_irrigation_annual_report_2018.pdfIn PDF document text
    • http://wepikupovug.myartsonline.com/lavumewafifinudetuz.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/what_types_of_chinese_food_are_gluten_free.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_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 5144 bytes
SHA-256: a51bdf733925702dd21297d1c9ddea408b9f733471c121c9fa054b9c39d2eac7
font_01_sfnt_off0001180c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 11948 bytes
SHA-256: e2307d044828166deda2e926119c5f74efefbec0109906239b16d669a58705af

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