Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc7ca6ad2b2794f…

MALICIOUS

PDF

109.1 KB Created: 2021-05-17 04:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8fff27e79254d1bebe522eb7111f88a9 SHA-1: 04c6ceac750e264b5f9ac3f3884feee294838794 SHA-256: edc7ca6ad2b2794fcbaa6b18bec13b549ca51169443fb250afca9efdf1a20c78
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with common phishing lures.

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://ponafet.ru/strik?utm_term=best+marketing+internships+summer+2020 PDF link annotation
    • https://cdn.sqhk.co/gijesali/jYigYp6/challenge_telugu_movie_video_songs_free.pdfIn PDF document text
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/fufakimepe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5ff84b0f3ac91.pdfIn PDF document text
    • http://lifeit.pro/97084704103wxl1y.pdfIn PDF document text
    • http://mysteps.online/wegotijefi9i0.pdfIn PDF document text
    • http://yognat.space/moto_rider_go_highway_traffic_hack_game_downloadza1zv.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/6767749678824mh7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_5fe51c2d186ad.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/FigOjep/aapl_stock_split_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390056/normal_60055998d9767.pdfIn PDF document text
    • https://bezatawe.weebly.com/uploads/1/3/0/9/130968967/jefenarumaratixosib.pdfIn PDF document text
    • http://braco.ru/who_is_entitled_to_statutory_maternity_payugxnp.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/minuwuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_6069169745111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vufudaz.rf.gd/sifuxo.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_834f0046c0354ca694a5748d1bedce13.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_88739f0be72e4b8591bff57531937506.pdf?index=trueIn PDF document text
    • http://liwumakagizir.rf.gd/sulifaxajakolemolegog.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_288e32b392684c1c83c00693c5f8f96f.pdf?index=trueIn 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_off00016a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A7B 5588 bytes
SHA-256: 4bf4ff71df0d3b4aaae4f0acf821bf77e957908d2bf48c8fa326afb26382092b
font_01_sfnt_off00017d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D54 12456 bytes
SHA-256: efa964663e8fe5c15328cb909b39ab7aa911ced20636d917d27d460d8d38f4d4

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