Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cf2d2b8663f8b9…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 04:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 098744a20fb07ba0c75e93df4523bf0c SHA-1: 03d4f0fb2f1c30d7bce230247016af078ad2238b SHA-256: 58cf2d2b8663f8b93d128d10130eeb2c8afc6ee39d5e3e6a4180cf0c4b1f9091
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing. While no scripts were extracted, the presence of external URIs and the heuristic findings point towards a social engineering attack designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=what+is+pra+in+dachshunds PDF link annotation
    • https://cdn.sqhk.co/sivefuxonix/Bf7hjQy/farmer_in_the_dell_walpole_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/haigiaS/extreme_speed_motorsports_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_5fe92de5b09d0.pdfIn PDF document text
    • https://cdn.sqhk.co/bisegepamitu/geggaia/48264307303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fc86638c5595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_5fd650f6b9fe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464522/normal_5ffb442a2f8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5fd8bb9f92679.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_9f27272ae8d64a39a2b6ef77e43a808e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomepixo/xesodurowitiwogalafadimu.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/daluwipapasanedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccb96ad-1686-463c-be18-b3e4b4c569e2/zebozuzunezun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6773c7fe-324f-4d6c-b5b9-2770c2964c5e/how_do_you_use_a_prayer_cloth.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_777cca4a316f448db18e07aebf990190.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6564fd9e-b2b5-46df-8939-736c2867c6af/13763828799.pdfIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_d7ab96a271d840c493bc1787e9063267.pdf?index=trueIn PDF document text
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_53e2614cf35a4c149d8da28e1986b1ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/zifejutebovomafezof.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_f098d7c29eef44c8ae1a42dcebda8ff9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/31100610094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8a1d1f-e188-4221-8e7b-12b6a16c3927/84992644414.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_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 5140 bytes
SHA-256: e793783306c67469d8400bbbcf46ab02ea78d545e9f311e1765f1a8c47e18b27
font_01_sfnt_off00010930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10930 10944 bytes
SHA-256: 3043447d460f6c49c8e721209328efafc040a7180016355bae9ebbd1c7c37dcb

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