Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f7aadb2e7ef469…

MALICIOUS

PDF

108.9 KB Created: 2020-12-30 20:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 22af59e6875fe1b2ef128c70e579f31c SHA-1: dde6025ea82d58177e3400314a335c30e986cf45 SHA-256: 20f7aadb2e7ef4692f6eddc63531a7e6d7a14db3fcb7df2141c2de7f1adcedc0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=asteroid+warning+2029 PDF link annotation
    • https://wuvipovuzodex.weebly.com/uploads/1/3/4/8/134846945/gelafuva.pdfIn PDF document text
    • https://durapafived.weebly.com/uploads/1/3/1/4/131438767/sebanamakige.pdfIn PDF document text
    • https://kimiligemapi.weebly.com/uploads/1/3/4/3/134343210/2068896775.pdfIn PDF document text
    • https://cdn.sqhk.co/zagusebipin/xghhdii/42549715444.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/28610b466f6f6.pdfIn PDF document text
    • https://nimivumunekal.weebly.com/uploads/1/3/3/9/133999229/mijurodexonif.pdfIn PDF document text
    • https://cdn.sqhk.co/miwurazaz/tK48jjl/drag_bike_racing_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/12kji8K/telifowobagoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abe0686-e517-4928-942d-6fafe717f6da/zopemajusaseke.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/96755244230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ed9834-4a15-459c-9ea2-2a744c7a6996/xomeded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef180c47-fca7-41de-a580-c5675daa6a40/total_gym_1000_manual_de_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9964f4cc-b85e-4280-925b-6e6128261c6b/cyberpunk_2020_character_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41cb7acb-7a33-41ce-ad44-9c3cf9de8d01/robin_hood_kevin_costner_pelicula_completa_en_espaol_latino_descargar.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_off00016406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16406 5472 bytes
SHA-256: adcdddcef5245648fb59fef19b2907a333ce511ec3efc2e50d00b9eac91ef2d8
font_01_sfnt_off000176bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176BF 14852 bytes
SHA-256: c464bc9821dcd0489d06494e6bda951089d892c114a67e7aaae6839328cfd18e

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