Malicious PDF — malware analysis report

Static analysis result for SHA-256 deae1c50f4b697e4…

MALICIOUS

PDF

169.2 KB Created: 2021-05-07 14:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 03bedbf6d43a9d4d947f01945b7c5c2a SHA-1: 5835790d5a5fd5d0257ac74591d1f1ede6a534bf SHA-256: deae1c50f4b697e4254eb5a30754a12a9a0c175f42517d202e4987cb213c6b75
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains text related to a search query, suggesting a lure to trick users into visiting the linked sites. The presence of external URIs and link farm heuristics further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://jacksth.ru/strik?utm_term=will+there+be+a+season+4+of+sao PDF link annotation
    • http://kufafukedexepix.mygamesonline.org/pelasek.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/fundamental_mathematical_statistics_gupta_kapoor.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/verbal_ability_questions_and_answers_free_download.pdfIn PDF document text
    • https://gixisinada.weebly.com/uploads/1/3/0/8/130814349/sejotubafivakolo.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/blockchain_mit.pdfIn PDF document text
    • https://nikupotipemami.weebly.com/uploads/1/3/0/9/130969226/fab58de6e6c7.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/62185366682.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/zoxosemaxikoxef.pdfIn PDF document text
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/866fcd5609c.pdfIn PDF document text
    • https://gefimopawudomew.weebly.com/uploads/1/3/4/0/134017284/716733.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/46165564238.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/html_to_javascript_client_side.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/buffalo_dairy_farm_design.pdfIn PDF document text
    • https://xezolemi.weebly.com/uploads/1/3/5/3/135324657/mefivitewipi-napuzon-sitomanazijunab-zusurizizuko.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/nonipesikiri/ribusipekilutijit.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/lazetigake.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/campbell_biology_8th_edition_online.pdfIn PDF document text
    • http://misanedajog.myartsonline.com/alural_preisliste.pdfIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_d9931fa6606d4608bc2caffc7f1148e2.pdf?index=trueIn PDF document text
    • http://gudujezakolomu.onlinewebshop.net/8d_approach_to_problem_solving.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_0e6f0d051fa2448f90ce06ee0254efca.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_1ec7d4caa2364b68bc4d03bf43d669d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bepukuba/how_to_start_jandy_pool_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/11_x_17_laminating_sheets_5_mil.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/84607914201.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_off0001d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5CE 44792 bytes
SHA-256: e0ec28bfb53d6c61c62849f71495898a63dea1d463b3ff8ee9cb81d6487eb254
font_01_sfnt_off00025ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25ECE 5096 bytes
SHA-256: 76880215dfd8497592be2930254cea6a72e61beda10ca83243eb997364d46862
font_02_sfnt_off0002702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2702B 11712 bytes
SHA-256: 81789d112df9f97efee6ef3d9b08903311f64151f3bdb5118a4090b5c89992c9