Malicious PDF — malware analysis report

Static analysis result for SHA-256 8913a49414a5f91c…

MALICIOUS

PDF

83.7 KB Created: 2021-04-11 20:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1dd60106c9fd776aed2a6649cc4d082d SHA-1: e9bd036482c345372548e64f2a8133f7d81a85f6 SHA-256: 8913a49414a5f91c313c6c17e9ed861a833ad9c5e749682a3ff60b0ba715f794
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL suggesting a lure related to a Samsung phone screen protector, likely to trick users into clicking. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=samsung+galaxy+s9+full+cover+glass+screen+protector PDF link annotation
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/4607146.pdfIn PDF document text
    • http://tobazoduto.22web.org/12075883127.pdfIn PDF document text
    • https://zevenilusowaj.weebly.com/uploads/1/3/4/3/134324486/dategimudarebotetul.pdfIn PDF document text
    • http://xajoraxi.22web.org/17931342323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_60386a567a1e2.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/ravevowunu.pdfIn PDF document text
    • http://rixuliketasaban.mywebcommunity.org/a_proposito_de_tu_boca_descargar.pdfIn PDF document text
    • http://jotetimaral.22web.org/501_bento_box_lunches.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/f6952c8.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/23997723009.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/ibps_computer_awareness_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_603fe49ea6e8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mofobasu.rf.gd/soldadura_exotermica_cadweld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9b704c-55fb-460a-9599-1fb4278acb5a/how_to_write_a_short_synopsis_for_a_novel.pdfIn PDF document text
    • http://femulupir.rf.gd/tanukefanakedifevefawuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478d4fa3-dc04-4cfc-bece-2fc4b73d5c65/serapidunopokodujiz.pdfIn PDF document text
    • http://bedegotix.epizy.com/lagu_barisan_para_mantan_planetlagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc936551-8f33-4548-985c-6baa6fa52f29/best_game_maker_studio_tutorial.pdfIn PDF document text
    • http://gawekavadave.epizy.com/xototowememunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c012fc9-4c76-40b4-be59-a4610c6f2fa0/the_non_designers_design_book_4th_edition_ebook.pdfIn PDF document text
    • http://pofulokadez.rf.gd/lokaganefosajujajap.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_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 5656 bytes
SHA-256: c515d5248ab5ea923e0d2750964b3d964c4cbf159a791c03a1bdf315bee074f1
font_01_sfnt_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 10952 bytes
SHA-256: 1d474e450d0a900ec91de081d365eea4febd6be2d2fa2d6d63d1d9ac6cb73ef3
font_02_sfnt_off00013308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13308 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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