Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd59e62c7e9e39de…

MALICIOUS

PDF

77.0 KB Created: 2021-02-26 04:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b245c48a6bdecaf1086bdcb514b1713b SHA-1: 828373f3d1b9b7099558ca7e72906bf86c03d82e SHA-256: cd59e62c7e9e39dec21f5c0b6353547ef1907c45950277057545ebeb4f8e6b51
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, and a document body that attempts to lure the user with a seemingly innocuous topic. The presence of external URIs and a link farm heuristic suggests the primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=where+did+abstract+mathematics+originate PDF link annotation
    • https://cdn.sqhk.co/libudezetuv/UOhja8r/xobijawinuvatotazofatab.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/MQSieqf/pong_king_party_3d_debug_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445340/normal_5ff0718babe30.pdfIn PDF document text
    • http://igcopyrightverify.com/6449525438hpj4q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5fd8516c36c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_5fe94e0291c73.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/nemorafusupazax.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/ahh64zO/ludubuserexarukozememipuz.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/dowjfB5/pepezu.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/digYRie/diy_paper_craft_wall_hanging_room_decoration_ideas.pdfIn PDF document text
    • http://glasshookahcatering.com/english_songs_lyricskooh6.pdfIn PDF document text
    • http://axecheat8.xyz/yuri_on_ice_12_subly2mx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_601604db2db05.pdfIn PDF document text
    • http://reduslim-europa.site/how_to_adjust_evenflo_car_seattwj48.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/3hdgcie/powonudebapepinetevubufe.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/wood_top_coffee_table_with_metal_legs.pdfIn PDF document text
    • https://cdn.sqhk.co/papovezegep/ibjhjjf/67103854417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satawakerexe.atwebpages.com/74078064544.pdfIn PDF document text
    • http://wexewowi.rf.gd/57229375030.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_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 5472 bytes
SHA-256: 53cd0f06977ef27b5cfb60564b0a6442079980faadbbc3b0d88c33d8fbb23f62
font_01_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 11424 bytes
SHA-256: c64defef90b1458df53369d46a6d705ddf4c3061d87dd09a080cffbc3a0fc4f1

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