Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda870184045f50a…

MALICIOUS

PDF

72.5 KB Created: 2021-04-02 22:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d42d242d474a4edacc595a1b8129d961 SHA-1: dcfaa8abcdf26009ebc7fa840e960b7498969536 SHA-256: fda870184045f50acf3eaf917b37544d2f2a824622d3fab7db4b4bcb286963e2
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://jumiwimov.ru/strik?utm_term=gis+fundamentals+bolstad+6th+edition', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=gis+fundamentals+bolstad+6th+edition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5ff02940692ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_603c607935e33.pdfIn PDF document text
    • http://hairsprof.ru/gestion_de_la_calidad_total_cuatrecasas4j3e9.pdfIn PDF document text
    • http://fumigatoff.online/attack_on_titan_manga_character_listw3oxv.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/gjHfwih/wordscapes_level_8531.pdfIn PDF document text
    • https://cdn.sqhk.co/fufowomusixi/ghibMtq/best_coupons_for_groupons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5ff9c60c0434b.pdfIn PDF document text
    • https://cdn.sqhk.co/xejarirep/hc2bBij/legimobixogitiv.pdfIn PDF document text
    • http://idealica-ordina.site/c_mvc_interview_questions_and_answers_for_6_years_experienceqcfg1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_6030859b76157.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/translate_romanian_to_english_onlineyewsm.pdfIn PDF document text
    • http://zuzimosutikume.22web.org/email_marketing_plan_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/ighgIhh/21220333333.pdfIn PDF document text
    • http://blog-millionaire.buzz/streets_of_rage_4_ps4_cheat_codespw4rn.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/manual_ecocardiografia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_60445a3834397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485810/normal_60313e7f32a75.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/waifhhp/30914234183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famekuputoda.myartsonline.com/rrb_biology_questions.pdfIn PDF document text
    • http://xilavugepiw.rf.gd/philadelphia_eagles_wallpapers_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE5 5376 bytes
SHA-256: 214c300f3a248a34984401425accabff4c115f6e9d98220acd27f4f6f02dcfb1
font_01_sfnt_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 11876 bytes
SHA-256: b20e706aa0d0e756e62e82cd25cce1feb6d92f51a2a0a43a591927e3d9b574a9

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