Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77517c09091a74b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 23:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b661e707d3588aef638a3d85740afa34 SHA-1: d7d1d27c6bf2fc75dde33dc436b9089354634d9f SHA-256: c77517c09091a74b526e6cb49d81dd05267f9ecb341bb5f540fd7154d9ce3873
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a heuristic indicating it's a link farm on disposable hosting. The document body, though heavily obfuscated, contains metadata suggesting a connection to 'pc hd bollywood old movies', likely a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://bologen.ru/123?utm_term=pc+hd+bollywood+old+movies PDF link annotation
    • http://nuzupamumobal.22web.org/68061568735.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/introduction_to_management_accounting_16th_edition_solutions_chapter_3.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/nogedirobosijop.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_many_carbs_are_in_an_old_fashioned_glazed_donut.pdfIn PDF document text
    • http://rulerezimatot.22web.org/gefed.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/arby_s_menu_prices.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/how_can_i_send_a_video_from_facebook_to_whatsapp_status.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fa215d-cf47-4ed6-b2b2-71163f6a5726/conditional_factor_demand.pdfIn PDF document text
    • http://xadezifu.rf.gd/how_do_you_calculate_load_bearing_capacity_of_a_roof.pdfIn PDF document text
    • http://pofijiserige.onlinewebshop.net/53950553514.pdfIn PDF document text
    • http://rivetibixonapaz.myartsonline.com/bohemian_rhapsody_piano_sheet_free.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_c41ef2d8e4284d5a810afec134540c8a.pdf?index=trueIn PDF document text
    • http://xorikija.epizy.com/agmark_logo.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/livomazaridavuwesa.pdfIn PDF document text
    • http://xafafogaditeki.rf.gd/how_do_i_reset_my_slot_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec76605d-1561-48c0-95c8-6ada7f3dec35/27827176308.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/basic_piano_songs.pdfIn PDF document text
    • https://78f121e6-5824-477f-9480-4bf23eba804c.filesusr.com/ugd/9564ad_e7290fa1fe7d4e5a8bd1c4da815bbfbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f88576-6c0f-46de-ac66-bf7f64b0e900/dimiwivetututamamaruj.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_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 5268 bytes
SHA-256: dc2394270e0ade03e01d6abed6913f8630dd9df146281ca48a2ab393d817a02c
font_01_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 11012 bytes
SHA-256: ab3e0f8e6510a3e932fb900b41a99daa255bfe000c27b9df6e3fb4c916168fdc

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