Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35d5f29fe95c7ee…

MALICIOUS

PDF

70.2 KB Created: 2021-02-19 07:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3ca8c2a8740e059e245cf5f2b2c4e6df SHA-1: cd3d726e4e936e5e3e0e5334e1e8d05c4d8441c7 SHA-256: e35d5f29fe95c7ee1950cc9119bc09709bc0a602683c69b1e8e2a8057228c854
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to a "Jett skill guide", suggesting a lure to direct users to malicious websites for phishing or malware downloads. The presence of external URIs and link farms indicates an attempt to distribute or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=jett+skill+guide PDF link annotation
    • https://cdn.sqhk.co/jatizaru/jbg8kQ6/toxalumezenelug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369648/normal_5fceb2a7e404f.pdfIn PDF document text
    • https://cdn.sqhk.co/pumurugo/XD1jbgc/dodagevoliwobaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5fe02343c6172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_60003baa04cd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_600f06252ab5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_602d76a0bbd73.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/Yl1Xidb/cat_bird_game_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/jdRQmKf/movie_quizzes_fun_trivia.pdfIn PDF document text
    • http://zekabivalejasaj.22web.org/29655370192.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/ekehhhd/sno_ski_jumpsuit_topshop.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/baroxafitolereroduz.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/hjieSgj/walking_dead_no_man_s_land_outpost_strategy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://finesegugumemo.epizy.com/88686124565.pdfIn PDF document text
    • http://segixof.epizy.com/fosupep.pdfIn PDF document text
    • http://refusenub.rf.gd/compound_effect_book_amazon.pdfIn PDF document text
    • http://korimuf.epizy.com/lincolnshire_police_incident_reports.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_off0000da30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 4740 bytes
SHA-256: 982cb97edfdcc79e1c7c4b0534d937e8589553d1b74d9ec8bf934d7d73237fed
font_01_sfnt_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 9936 bytes
SHA-256: efbca326b2c37eac08a6c0ec8de1add363dd7264c0f80153a02f135ba855f9ff

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