Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eda092679b0aba8…

MALICIOUS

PDF

80.9 KB Created: 2021-03-31 22:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 555cdb85daa902ead369c7c189ac38c9 SHA-1: 3ac6ff6c0f18064f4ea5856dc9fc1205a9e384f2 SHA-256: 1eda092679b0aba8ea181ad31bed684d2ffa54f0daa37b2322d22e9d42c609b8
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign. No scripts were extracted, but the nature of the embedded URLs points towards a T1566.001 (Spearphishing Attachment) initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=the+lorax+story+online PDF link annotation
    • http://walawatomu.mywebcommunity.org/85449506366.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/cedric_robinson_black_marxism.pdfIn PDF document text
    • http://redirerer.medianewsonline.com/autocad_commands_free_download.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/55854898856.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/calendar_2020_template.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/mufojag.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/PFhaSnU/guess_the_picture_close_up.pdfIn PDF document text
    • https://puliwive.weebly.com/uploads/1/3/4/6/134660228/lunurativad-poligowewibit-wekejuvuge-zudifubekav.pdfIn PDF document text
    • https://nuzazetoxulo.weebly.com/uploads/1/3/1/6/131636602/bf9b114eaaf.pdfIn PDF document text
    • http://sowinod.mywebcommunity.org/hedwig_s_theme_easy_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/fPRwrig/cfo_job_description_resume.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/2NfZhjO/midobugefoso.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/gokako-lujefikusik.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/iaaRwgj/geraxarilumerevur.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/maths_aptitude_test_for_class_10.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/kigofoguvavaranogekozabe.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://gujimimokogofe.rf.gd/31811044594.pdfIn PDF document text
    • http://xatudoxi.epizy.com/36367345816.pdfIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/zuxuwo.pdfIn PDF document text
    • http://xafepabofi.epizy.com/agile_methodology_scrum_tutorial.pdfIn PDF document text
    • http://vesoromu.epizy.com/bhagam_bhag_songs_bestwap.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 4680 bytes
SHA-256: 27910bd65862828e6b05df3a836e6a106a1d10d822360d3548faf79d59eeba3d
font_01_sfnt_off0000eb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 10988 bytes
SHA-256: 558b0cef2a9a1c300dd32088c9bafd4cb4c735e6015274287c1cbb89f4625659
font_02_sfnt_off0001112c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112C 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off0001265b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71