Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5d671177f13e1f…

MALICIOUS

PDF

93.3 KB Created: 2021-04-23 02:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ea7276659af7e044ad8ccccfb5204772 SHA-1: 23c13ee3a889cd38afdaa95ce6b1fdae890b3b18 SHA-256: 8f5d671177f13e1f4a170f17662b659bd03b238ee99f9680877a583a43c23dd0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic identifying it as a link farm. The primary malicious URL, 'https://dugedepap.ru/strik?utm_term=how+to+perform+a+financial+analysis', suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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=how+to+perform+a+financial+analysis PDF link annotation
    • http://zevibeponakat.getenjoyment.net/76372453500.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/3436158.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/67607815807.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/pegokuwo.pdfIn PDF document text
    • http://nugowimabu.mywebcommunity.org/brandon_sanderson_steelheart.pdfIn PDF document text
    • https://vokafevevuw.weebly.com/uploads/1/3/4/3/134320681/zajoxetux.pdfIn PDF document text
    • http://lasuvita.22web.org/53207709479.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/67839524118.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/shark_swivel_180_sonic_duo_scrubbing.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
    • https://uploads.strikinglycdn.com/files/2649ae21-4071-4e11-b708-da8c935194cb/48180840652.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/cdc_vaccine_information_sheet_for_hepatitis_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafc0314-30f9-48f5-8b5b-ba8bd03c82ad/no_central_or_peripheral_cyanosis.pdfIn PDF document text
    • http://kodexogezetegir.epizy.com/basifoganumedunewadodu.pdfIn PDF document text
    • http://zusagijumetuze.epizy.com/zorez.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/banisevomejozaga.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/best_paid_apps_android_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c424fce-847d-45e2-a3e3-4c65e60e5836/dunkin_caramel_iced_coffee_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c20cbb2-f53b-450a-8fd4-e4f7c3595f27/libefiwumitaxoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd3a84f-9a4e-4394-9e24-55572779ad05/59215889181.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/how_to_turn_alarm_off_on_timex_marathon_watch.pdfIn PDF document text
    • http://lusiromipu.epizy.com/87154496478.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/does_breville_make_good_products.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/digital_weighing_scale_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/29351134495.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/align_trex_500_pro_manual.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_off00011fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB8 5104 bytes
SHA-256: eb05aea9be20c2027ac7e7f974e154154d2891e671c0b9d70cebe883fe0e8f43
font_01_sfnt_off00013106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13106 11344 bytes
SHA-256: 6f0d9f445dfa9da4e2a68a2f2ad8e510f6fcda93a282c867cf54f361f9b6e797
font_02_sfnt_off0001578f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1578F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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