Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1ec4a5950ebaf9…

MALICIOUS

PDF

74.9 KB Created: 2021-02-25 18:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 10e156705223f3d6367852a301b465d6 SHA-1: 616d0e9dc647188370072d0e475ded7900059204 SHA-256: cd1ec4a5950ebaf9a2753b9b608ed333959f8fc2ee36782c7eec0b8a5e010218
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful sites.

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://baarspo.ru/strik?utm_term=kenmore+stick+vacuum+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454694/normal_5feedc55bdde0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458631/normal_5fd1d1b6db5ac.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/5e2eb.pdfIn PDF document text
    • https://cdn.sqhk.co/lewenowaxer/jfRhhjh/dead_ahead_zombie_warfare_wiki.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/79a68b767e0.pdfIn PDF document text
    • http://votofeveta.iblogger.org/are_cuda_cores_important_for_mining.pdfIn PDF document text
    • https://vejotawugupexo.weebly.com/uploads/1/3/4/7/134756202/8dc515e85baaec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5ff58c3ed9ce0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5ff247c0eabe7.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/8yo9hjZ/96818447894.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/0jejjeD/26515294589.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/fejuva.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/nif7Rji/cookie_clicker_cheat_codes_sugar_lumps.pdfIn PDF document text
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/kesuwetolona_mimakuvisipef_mawira_xopeka.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/waxapoz/heavy_rain_ps4_trophies_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/moto_g6_plus_amazon_quiz_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/wowiwasuzagiduziz.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_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 5140 bytes
SHA-256: 6bcc37f1f8717e2ddce99354ec76b841543977dbad51e64d4b946dcdb3178562
font_01_sfnt_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 10996 bytes
SHA-256: 3a38da063eddb56c660db7a27b13b7e7b3e26715f49df55b36bb28794d65aa76

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