Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec4e5b877e03f57…

MALICIOUS

PDF

84.3 KB Created: 2021-04-08 04:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03fb5c61f11f4a8120947ab37514d713 SHA-1: 2b4e9232123786b1c433b72eb906209d9fa76450 SHA-256: 6ec4e5b877e03f57a9a98cb2543d21abc7cca973d12f73c91e027288229076e9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which are associated with link farms or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to sales, which could be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/wb?keyword=used%20honda%20dirt%20bikes%20for%20sale%20cheap PDF link annotation
    • http://pafexomasig.iblogger.org/blanching_of_food.pdfIn PDF document text
    • http://nuzovofevaduw.22web.org/speed_booster_for_uc_browser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_606e367b414d6.pdfIn PDF document text
    • http://wavasupedip.22web.org/towigegenevokukimavili.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/buzedinuzorasetesizotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417658/normal_60097dec47a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_606710dc90a7a.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/around_the_world_in_80_days_great_illustrated_classics.pdfIn PDF document text
    • http://gsmall.space/jikimowelemikelit17pah.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/cervical_radiculopathy_home_exercises.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/currency_trading_download.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/a_place_to_call_home_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5ffe8eedf0e8d.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/983728937560ub8d.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
    • https://uploads.strikinglycdn.com/files/b6567164-f2fe-49cb-92ee-2e1cdf80c27c/polusotonivewo.pdfIn PDF document text
    • http://tozubisifaxojof.rf.gd/ansible_template_in_loop.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/susevuta.pdfIn PDF document text
    • http://merapenerabari.myartsonline.com/cours_anglais_traduit_en_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04729844-dcff-44df-ab85-7e2a851b80bf/what_are_the_different_drawing_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbdfcc5-a019-4c78-9910-93173ebe095c/bose_wave_music_system_model_awrcc2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4497abf-1476-4343-a2ea-3830e07322e7/56659504813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7c448a-9874-47da-a667-88ee037873a2/bedirokazebedal.pdfIn PDF document text
    • http://lovinanijorabe.epizy.com/10988454905.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/30480789978.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/28269886403.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_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 5224 bytes
SHA-256: 60415f83058777ef667757365a9462580805bdee291a6f244eba1420c49ddf12
font_01_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 11960 bytes
SHA-256: fca43c1306b4f5407ada7ac1c295d64fe8eb91dd3a2b0fe4569221145bd4f66e
font_02_sfnt_off000135ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f