Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40f3fbf2b217b7f…

MALICIOUS

PDF

95.7 KB Created: 2021-02-28 18:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a45f0cbb3a98ac0b84a45bc06ab120f SHA-1: d958f85085c88f977c9e24a6134b259c0c758477 SHA-256: c40f3fbf2b217b7f1be74e822f5942b5aa475b3f7f9f0c6f85e546803f44d66e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and one specifically targets 'linksys e1200 router default password'. This suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=linksys+e1200+router+default+password PDF link annotation
    • http://xejikunibe.22web.org/subaxoxofoniralut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_5fe763bb5f424.pdfIn PDF document text
    • https://kurixaxewa.weebly.com/uploads/1/3/1/3/131383664/zesifuve-vawavolojot.pdfIn PDF document text
    • http://zumedemuruva.22web.org/80919164083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389586/normal_5ff7e288ad185.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/8uFqbAT/13750053731.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/ejeLubA/turn_data_roaming_off_iphone_7.pdfIn PDF document text
    • http://kiguporut.iblogger.org/sample_experience_certificate_format_for_school_teacher.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495707/normal_6001fcb68202a.pdfIn PDF document text
    • http://soluzixod.66ghz.com/cateye_strada_cc-_rd300w_manual.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/5461427.pdfIn PDF document text
    • https://sanorasawuvut.weebly.com/uploads/1/3/0/7/130738762/9678032.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/fFEgetM/english_dj_song_video_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fc97de573c38.pdfIn PDF document text
    • https://rodibafabe.weebly.com/uploads/1/3/0/7/130738722/lobax.pdfIn PDF document text
    • http://xapizokawe.iblogger.org/acute_kidney_failure_treatment_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekijokedod.rf.gd/logitech_z_5500_price_in_india.pdfIn PDF document text
    • http://budakofis.epizy.com/war_horse_harley-davidson_hours.pdfIn PDF document text
    • http://fusarafabar.epizy.com/chicago_manual_of_style_research_paper_format.pdfIn PDF document text
    • http://ninanupazazudad.rf.gd/39137445113.pdfIn PDF document text
    • http://lizomepikoxi.epizy.com/wilulamewulafukagom.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_off00013722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13722 5560 bytes
SHA-256: a8d451b06de7347563f47b68b9c4abae7e9bdf15bb8d6984740adcc91b7ca53a
font_01_sfnt_off00014a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A49 11920 bytes
SHA-256: 9d4aa6f6865f98302f18ed700a57970f58808c4b3bc242f1a9c804def4fde524

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