Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea896af371dbd7f…

MALICIOUS

PDF

80.5 KB Created: 2021-02-20 00:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1f06f05451b30fd40bc0aad07e6abe35 SHA-1: e044e6c1051968a627b11f96b1d8e7017c8bb8fc SHA-256: 0ea896af371dbd7fb4182c052e61736334982c8502678c8864134c9b854ed72b
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and potentially malicious URLs, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards an attack pattern focused on redirecting users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=the+house+on+mango+street+answers PDF link annotation
    • http://pasoxegidameso.iblogger.org/neet_pg_2019_answer_sheet.pdfIn PDF document text
    • http://55571.ru/kazotilexudexazi2enf1.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/piponuravodazul_xonenufad_kibujulemimer_zoviburofume.pdfIn PDF document text
    • http://finansi-7.online/93187454452e9az5.pdfIn PDF document text
    • http://ergors.space/rovanapilaro7thva.pdfIn PDF document text
    • https://malufatagu.weebly.com/uploads/1/3/0/8/130874424/fukufitirufutil-birajotivamujok-welafufeje-sagexusapir.pdfIn PDF document text
    • http://vezugumak.22web.org/81689691255.pdfIn PDF document text
    • http://vugijow.iblogger.org/kudozamokorufarizipisugiv.pdfIn PDF document text
    • http://garantiya62.ru/chemisches_gleichgewicht_formelnq28yf.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/tsjTGjc/dujofonujavikiwizamexo.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/iexgje1/gobusedu.pdfIn PDF document text
    • http://zujavok.22web.org/ct_scan_head_and_neck.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/7627913.pdfIn PDF document text
    • http://world-wild-shop.com/wunekekozibanidenibw5p9.pdfIn PDF document text
    • http://vovpomnim.ru/gubedotikoleninobuzq8p2d.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/zepabefof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamixawikisif.epizy.com/the_dictator_aladeen_ringtone.pdfIn PDF document text
    • http://tununik.epizy.com/27611528042.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/694155015.pdfIn PDF document text
    • http://tejabogakulidit.epizy.com/ps_vita_slim_silicone_case.pdfIn PDF document text
    • http://lexepetilak.rf.gd/jowur.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_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 5108 bytes
SHA-256: 33a5ebb0e6a5cb58fb8c96062bca1215eb6323d8873c042aafd28125806a8cf2
font_01_sfnt_off00010f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F84 10784 bytes
SHA-256: 25f6f51873a35717739ba67e6d3ee0803ff9dea8800e7dc07e25ab4c9d81563f

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