Malicious PDF — malware analysis report

Static analysis result for SHA-256 969553c42860cb7d…

MALICIOUS

PDF

80.5 KB Created: 2021-04-11 06:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0a4eabb66d284eb56891b56ef9a28f2 SHA-1: 115ee1cef9cae1d36a973cf9503b724f05b5bc32 SHA-256: 969553c42860cb7de9dbb69191fd626464633b39330d35c8161f505d5966543f
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 0.9954

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://midufefew.ru/strik?utm_term=washington+football+team+new+name+possibilities PDF link annotation
    • https://paxowamowutujaf.weebly.com/uploads/1/3/4/3/134322095/migoxenekato-tepubovas-mowode-wulobi.pdfIn PDF document text
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/zevafomowupebo_bogilufed.pdfIn PDF document text
    • http://butalinonoruma.scienceontheweb.net/61364450091.pdfIn PDF document text
    • http://tipefumasozop.22web.org/learn_microsoft_excel.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/kisagiv-vumogija-wixaxeno-dokez.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/56217594805.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/57826522941.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/d3a7d4ea77f0e55.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/wugevijoke.pdfIn PDF document text
    • https://sonoredepi.weebly.com/uploads/1/3/0/9/130969061/dinixiwop.pdfIn PDF document text
    • https://kipofazusaf.weebly.com/uploads/1/3/1/3/131379409/7992343.pdfIn PDF document text
    • https://guwagigiruf.weebly.com/uploads/1/3/5/3/135303004/delawitod_zukirew.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/tejolupared.pdfIn PDF document text
    • http://monabis.iblogger.org/past_tense_spanish_worksheet.pdfIn PDF document text
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/59850636311b747.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
    • http://gigezevozaf.epizy.com/20367442792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1746cb2-8620-4d3e-b500-bb8a4939e95f/calories_in_large_dunkin_donuts_iced_coffee_with_skim_milk.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/fawuluwuwemij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4115e0e1-a8c9-49c0-96e6-98ab6ad8b70f/keurig_k45_elite.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/zavike.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/leluluratavewetaselagusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bceb879b-05a7-4f53-88bd-d0a11215e780/city_of_quartz_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf9f649-7bbc-46dc-8fd7-459ec03de7ec/what_is_torque_release_technique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7148598-d55b-44df-b1f9-8b9f43556be9/attack_on_titan_wallpaper_iphone.pdfIn PDF document text
    • http://koferajovu.epizy.com/zumijidivibexolonubafuf.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/html_email_template_codeigniter.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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 5252 bytes
SHA-256: 0fcbf3cd1d0c68c3f7c964d0cad2ccb3fde506278576cbca608928c0660bf695
font_01_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 11004 bytes
SHA-256: c9c5cd61e208cd8780f272d90cd740691d6cc40f7917a79c0e696b3a38cd411a
font_02_sfnt_off000125a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f