Malicious PDF — malware analysis report

Static analysis result for SHA-256 a332901f72d320c7…

MALICIOUS

PDF

73.5 KB Created: 2021-04-25 16:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9fd10951a96af6d1abd9779f6b14e109 SHA-1: e79d1a1fda2356d1f45721d03b5bd7a66702550d SHA-256: a332901f72d320c71b28200e33cea2b47d5a9e1dd54fd48ad295f5ed219a52a8
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 links pointing to disposable domains and potentially malicious URLs, indicating a link farm designed to redirect users to harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=electrical+engineering+technology+colleges PDF link annotation
    • http://cancandance.org/30639323989zbayu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_601652aecc812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448110/normal_5fe4c4695ca91.pdfIn PDF document text
    • http://pixell.store/dungeons_and_dragons_eye_of_the_beholder_walkthroughz518x.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/abordagem_comportamentalista_mizukami.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/w10m_bridge_rectifier.pdfIn PDF document text
    • http://vazewuxu.mywebcommunity.org/jufudunipos.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/gf4iid7/pivenogezazinirataxok.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hbLjjuZ/class_9th_maths_ncert_solutions_chapter_7.pdfIn PDF document text
    • http://gufelujoziwuki.iblogger.org/zaduwanokiresogasebad.pdfIn PDF document text
    • https://cdn.sqhk.co/baxikomo/pqgf3nk/fufexul.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/entrepreneurship_development_question_paper_bangalore_university.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/Ijdihii/amazon_flex_driver_app_download_uk.pdfIn PDF document text
    • http://giwodusab.iblogger.org/also_sprach_zarathustra_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/bUrWgee/tolifukuvakulodafogasad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_601914b8af916.pdfIn PDF document text
    • http://sotatetivula.iblogger.org/bulidowusozovej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saluwagasa.onlinewebshop.net/pudiganum.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/causes_of_lung_cancer.pdfIn PDF document text
    • http://nowavusutoroko.epizy.com/kulegixe.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/el_libro_vaquero_imgenes.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_off0000e333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 5120 bytes
SHA-256: 5664fd44d839ecba169003c5bda9dd41026ea7c8b8cf8a317fe594db2c7adf7c
font_01_sfnt_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 10540 bytes
SHA-256: 80fb81f37cccb8c17da572a585ce83d9c1118cf367a4cc1e550c945c1f76b887

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