Malicious PDF — malware analysis report

Static analysis result for SHA-256 617741fd4d73594f…

MALICIOUS

PDF

103.7 KB Created: 2021-03-17 17:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9bf4220d7bcc9bf16a0f88ba33ec7196 SHA-1: f1ddace968a589dd856cb5c8ba50b7b6abadb577 SHA-256: 617741fd4d73594f8c7125682416bd4a0051e431f5e20595705c9e28e39b82c9
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, with a primary URL pointing to a site designed to appear as a search result for a specific PDF topic, likely a lure. The PDF also contains embedded JavaScript, which is commonly used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=budismo+zen+japones+pdf PDF link annotation
    • http://lowusonuraku.mygamesonline.org/definicion_de_aprendizaje_segun_varios_autores.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/2538749.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/kamogatuf.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/notas_de_canciones_cristianas_en_teclado.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/4f9cefae.pdfIn PDF document text
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/3157175.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/xesapekibel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagajerenaruvuz.rf.gd/64711463602.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/sasekamabepurosupap.pdfIn PDF document text
    • http://xejonitofopim.epizy.com/printable_2019_calendar_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/7297736773.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/81666502214.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/jeep_auto_body_shops_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/compare_epson_perfection_v600_and_v550.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/24480195184.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/22242370862.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/74348983987.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/survival_food_bucket_wise.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/kali_linux_tools_user_guide.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_off000126fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FD 14708 bytes
SHA-256: abdb87ec8f3eb5fad6ccd68a2901fdb316324ebbba91c191d86ef04c73a87ef3
font_01_sfnt_off0001558f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558F 5236 bytes
SHA-256: 0ebad036be0c1a59c967b9fb90469e05380e87e92e0ca13c5fef028c9f7ebde2
font_02_sfnt_off0001675f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1675F 12856 bytes
SHA-256: d524c7885875f8583141d454741ae7840431a77d03ab34973118af3d5a7bed53

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