Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebd2cb7c6a963ac…

MALICIOUS

PDF

75.8 KB Created: 2021-03-11 08:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a7fe67e77259b3bd89d462d1e6dd632f SHA-1: 36b63c59692b0c06a3aee717db46d05857383243 SHA-256: eebd2cb7c6a963ac9e376d2716e0e1af9caae8a47bffd56caac7c0e63d87568f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://jumiwimov.ru/strik?utm_term=data+mining+meaning+in+computer+science PDF link annotation
    • https://xepozumer.weebly.com/uploads/1/3/1/3/131380160/zafokoxo_nekamibog_bobiseg_pegomexev.pdfIn PDF document text
    • https://sufogewanogona.weebly.com/uploads/1/3/1/0/131070160/2393995.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/fatunab.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/zolibilekupoz-lajejemebuleg.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/tikosaxeruwutimogu.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/netuzukasixopap-kurazuvufava.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/8019880.pdfIn PDF document text
    • https://vefapabawi.weebly.com/uploads/1/3/0/7/130740427/905f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_601ba5636de8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_601fb287b7620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc72b38f17c5.pdfIn PDF document text
    • https://nusuvonofa.weebly.com/uploads/1/3/1/8/131872273/mapid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizup/java_1._8_for_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/8717892647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a24a2c-7feb-4b4f-aee4-3bac50b2deba/is_model_3_better_than_model_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b30626dc-7395-4ee8-8d32-10ea67815b3e/maxi_cosi_pria_70_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0fb398-6d54-44e2-b8d8-8f1adf67a3e5/how_much_do_a_private_investigator_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980e59ea-83e3-42a1-819e-d38f8db27148/gezefiruviju.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/xepulaguputegufopo.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/analog_lab_lite_error.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/verduras_con_proteinas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb90cc52-0383-4a8b-b7c1-a3c06385595e/organic_chemistry_lab_exam_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/9717738670.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/siguba.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_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 5220 bytes
SHA-256: 7c01df917b76066dff9b9225223c0389e91f4db841c9c6289deccddfd3fee1b6
font_01_sfnt_off0000fdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 10508 bytes
SHA-256: 6d82078860636d80e1d3927bf28692e3c5d353befba4096c4c98d2ad363c982d

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