Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2508ecb26bee1c…

MALICIOUS

PDF

90.2 KB Created: 2021-04-05 06:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1a5a52d258f45e36b44e81ed7533f53 SHA-1: e07f05bf0f4ac44648053a79831067dfdc8fb5e7 SHA-256: dc2508ecb26bee1c9f93d97c0422165a5af5e6516f300a008dd531300f4a56d0
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and metadata suggesting it is part of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'sketchup make 2017 free download for mac', indicating a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://ponafet.ru/strik?utm_term=sketchup+make+2017+free+download+for+mac
    • http://fukuzowi.sportsontheweb.net/mesotelioma_pleural_maligno.pdf
    • http://koreanluxe.com/28851576740473qo.pdf
    • https://sipavokipepino.weebly.com/uploads/1/3/4/3/134330850/a3a462a.pdf
    • http://xatefukukisebu.22web.org/62619445171.pdf
    • http://euroshopmn.space/chromatic_scale_guitarl7fcl.pdf
    • http://vekvelo.ru/mizadotisexajemarejusancr9b.pdf
    • http://kulapub.22web.org/taputusidotiretakuti.pdf
    • https://kotuposa.weebly.com/uploads/1/3/1/4/131406283/473a514b5.pdf
    • http://nout-sale.site/subtraction_place_value_worksheets_2nd_grademgvk6.pdf
    • https://neloramobipetez.weebly.com/uploads/1/3/1/4/131407165/mofitikimij.pdf
    • http://fabulouss.space/health_and_safety_jobs_london_ukta6oh.pdf
    • http://sejojus.iblogger.org/bujepupuxerif.pdf
    • https://cdn-cms.f-static.net/uploads/4469836/normal_60590b41733f4.pdf
    • http://gonzo-3d.com/wadanohara_and_the_great_blue_sea_downloaddzfl3.pdf
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5feb7ba2e0046.pdf
    • https://cdn-cms.f-static.net/uploads/4408981/normal_605f6492d31c0.pdf
    • https://muboxofibadufus.weebly.com/uploads/1/3/4/3/134310828/6057028.pdf
    • http://rerixen.scienceontheweb.net/wrinkle_in_time_chapter_1.pdf
    • http://copytoshka.ru/garmin_drive_52_mt-s_5_gps_unit1zlbn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://julatelowix.rf.gd/nolunufotojowabaxuwoxa.pdf
    • http://pitugozuput.epizy.com/badrinath_telugu_movie_songs_free_320kbps.pdf
    • http://zozupajekuledus.myartsonline.com/vazopodorenuvodim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107c0.bin
248fa4aaf9cd7caf269c378a76bed126fa4392808a418a7f910fedcbbd6b5d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 5880 bytes
font_01_sfnt_off00011bc9.bin
15e1ea9a2b072504037ae44b6003f6ea121d156563007334af92b1f3b4868e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC9 11624 bytes
font_02_sfnt_off00014396.bin
bf5167c075d774c9e2ea62677ca3e8ada31171b92f4b1a4ec278e3e852de99fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14396 16320 bytes

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