Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaaf613dcf2acb5…

MALICIOUS

PDF

76.0 KB Created: 2021-02-19 09:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 048cfedcbd9e48a8957da7f0c7e24c7b SHA-1: 8bea47b52b284d4e5bdb03e78232187beee3b420 SHA-256: deaaf613dcf2acb5ad462e6f4026fe0170da36c76645aada3b773bf7b13d4531
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous external URIs, with one specifically identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

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://jottigo.ru/wb?keyword=what%20colour%20were%20roman%20slaves PDF link annotation
    • http://makululi.iblogger.org/fefulekazojabuvuxawol.pdfIn PDF document text
    • http://damvglaz1.xyz/how_to_use_tare_on_digital_scalee7p7r.pdfIn PDF document text
    • http://koprovk.xyz/pedoxonalixexigajipenuvo2wdbw.pdfIn PDF document text
    • http://risorabakuwurus.22web.org/11047672159.pdfIn PDF document text
    • http://zavudonalu.66ghz.com/94512388474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367004/normal_5fed3e851c756.pdfIn PDF document text
    • http://pomanonorajalam.22web.org/13730752392.pdfIn PDF document text
    • http://jonezuno.22web.org/geely_automobile_annual_report_2016.pdfIn PDF document text
    • http://fasodotujane.iblogger.org/nifozolojexusuwidilalafa.pdfIn PDF document text
    • http://oneitstore.info/activity_elimination_focuses_on_nonvalue-_added_activitiesj8f0h.pdfIn PDF document text
    • http://jinoxiresajigeb.iblogger.org/black_snake_moan_tamil_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nipalarinab.epizy.com/sajuga.pdfIn PDF document text
    • http://nenedabex.rf.gd/cut_and_paste_online_free.pdfIn PDF document text
    • http://kegotetebam.epizy.com/46666682003.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/zolufuvux.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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 5204 bytes
SHA-256: 73e6ab7ae98615b3d48f458e1627c4e68f33369b36f73b81d72a7018df552c83
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10812 bytes
SHA-256: 2f6635ca2d82de565490630b412a63ecca0c4fa1f8dfebd7bca1c05372d842f1

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