Malicious PDF — malware analysis report

Static analysis result for SHA-256 0629260b7b4a9481…

MALICIOUS

PDF

147.2 KB Created: 2021-02-21 09:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 867f2e804e4f5191bc52149b8c9f9dcf SHA-1: 6179839727df68e03355c2a69028c47986320329 SHA-256: 0629260b7b4a9481d9d7e0042a8147660099f6a18588d81d2d1e6a9be92feeb8
126 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 ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs and the document's structure suggest it is designed to redirect users to malicious sites, likely for phishing or to download further malware. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strong intent to direct traffic to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=rla+ged+practice+test+pdf PDF link annotation
    • https://cdn.sqhk.co/mugejufunij/fhIHhd2/sitting_room_chair_designs_in_nigeria.pdfIn PDF document text
    • http://tersq.space/20253717096czg6g.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/KhaEIgg/comics_unleashed_schedule.pdfIn PDF document text
    • https://rujikanonige.weebly.com/uploads/1/3/1/8/131872107/d4049a75642.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/dc5ec6.pdfIn PDF document text
    • http://mebelrostov.ru/51507370165hlqp6.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/kiwadojaporid-ladudiwivunila-detedaw.pdfIn PDF document text
    • http://uchebnoe.website/topiwe2suns.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/ZHgcX7S/37094789258.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/95igz8g/nejofoxotejawotevasadewo.pdfIn PDF document text
    • http://pelistens.xyz/16727714619826ql.pdfIn PDF document text
    • http://logmeinnow.xyz/evaluating_simple_algebraic_expressions_worksheetmkwa1.pdfIn PDF document text
    • http://shoppingyxplus.xyz/1401257831917eek.pdfIn PDF document text
    • http://getallcreditscores.info/how_to_work_a_celestron_astromaster_11441f5e.pdfIn PDF document text
    • http://itfamily.info/20620114180j08ox.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/7fab1Ji/9626903312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/28255969700.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/android_watch_software_update.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/agile_process_flow_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/livefumupa.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/5709460818.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_off0002061d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2061D 5328 bytes
SHA-256: c750661a291541cd81edc2c5aecd53e819b02aeaab24368e6aeb361f1e51795e
font_01_sfnt_off00021856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21856 10832 bytes
SHA-256: 6ee66fc6278e9ec246b963368983a9a05e5dcac5b3de6fe19b79684baadb9b93

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