Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0a135556e03910…

MALICIOUS

PDF

78.6 KB Created: 2021-04-12 07:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d0a46fcf19d819afdcdda41f0115b571 SHA-1: d7c7c94d301d0d53ee1f61f90a83900eb3bbe36e SHA-256: 8d0a135556e03910a4edf6c363d2becaa7e5f1c5e3b49fb1ade92c68bf157aaa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to drive traffic to potentially malicious websites. One of the primary URLs, 'https://seumenha.ru/strik?utm_term=ncert+maths+textbook+for+class+12+solutions', appears to be a lure, masquerading as a search result for educational content to entice users to click through.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://seumenha.ru/strik?utm_term=ncert+maths+textbook+for+class+12+solutions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495849/normal_6010e62157a3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_6001cfd0313d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_60421f70c28ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5ff092e759503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408601/normal_5fea1aecc4043.pdfIn PDF document text
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/7030928.pdfIn PDF document text
    • https://pajapuzewufivu.weebly.com/uploads/1/3/5/3/135305216/dazavuvizizepobo.pdfIn PDF document text
    • http://favowavuwoxi.iblogger.org/rivejakesinotigexoweli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_5fe7f80ced9ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_604930aaeb771.pdfIn PDF document text
    • https://jugujepatuw.weebly.com/uploads/1/3/4/9/134900825/xesijij.pdfIn PDF document text
    • http://loxapul.iblogger.org/bimifa.pdfIn PDF document text
    • http://texulateniz.iblogger.org/71634093888.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefesogojodegu.epizy.com/autocad_3d_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/why_is_my_ice_maker_leaking_water_into_the_fridge.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/48583554551.pdfIn PDF document text
    • http://ralewawixofax.epizy.com/319_bus_schedule_nj_transit.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/6546333848.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/resatemosaju.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/81694823616.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/electrical_engineering_drawing_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/wafewodumuzosibu.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/relays_with_forcibly_guided_contacts.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_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 5544 bytes
SHA-256: cfd0a8e8bdc32d8e077b5f959eaee8d43b72a81586b8d650ec7b976e9de1b917
font_01_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 10792 bytes
SHA-256: 0bf0f80c247a6c71d0ff61d315ef9cf3a1b166f6ecbc148cb8ef9cd707e93b0f

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