Malicious PDF — malware analysis report

Static analysis result for SHA-256 46592c3e570d1ef2…

MALICIOUS

PDF

84.6 KB Created: 2021-03-06 12:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a522755f2ac3a309deae8f6103b1ee23 SHA-1: 5cd05e46fa44ea05c5c4f5e0365c9a8f90834bf8 SHA-256: 46592c3e570d1ef26f3784609457d7470fa39bb181a1575035ccdad80647bab3
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to business plans, likely intended to trick users into clicking the malicious links. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=the+primary+purpose+for+developing+a+business+plan+is In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485176/normal_5fe7089dda328.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/85626745055.pdfIn PDF document text
    • http://erogan24.website/jlab_sport_wireless_headphones_manualkknxx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_5fdb0dc69f5e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_601f3fb1745c7.pdfIn PDF document text
    • http://dreamingdeveloper.com/kefaxasulanevowiwekutbbpqj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446500/normal_60024c10bed56.pdfIn PDF document text
    • http://mivakoxukike.22web.org/67416090691.pdfIn PDF document text
    • http://salonop.xyz/zileruferubuvidimafiwigikqbud.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/university_of_colorado_denver_electrical_engineering_faculty.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/a4f90f26-d414-4262-9cb0-19da971a73b8/92382610773.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_d93d6aad80464c1493774fac66d8c497.pdf?index=trueIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_2dd872edba124558bef88e12d2dbfc05.pdf?index=trueIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/vosipip.pdfIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_eda8c8c9b9c54252b7937eb629d97aec.pdf?index=trueIn PDF document text
    • http://zikenonuto.epizy.com/counter_strike_online_nexon_zombie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70ca3d9-2b30-4e23-93ab-944a9d17e941/94754958963.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 5704 bytes
SHA-256: d2097b328836365631c9e1e641c9dc6d4b66a2ffbc6ecb60343258d216ad518f
font_01_sfnt_off00010c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2B 10496 bytes
SHA-256: 85fb8c49ff516e733b144cf9a8075ef485e32df4a1b7ce6d37ea97504dae2477
font_02_sfnt_off0001304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304F 16028 bytes
SHA-256: ced8b21f0c91c47eb2a8e10a251844195ecd6fd413d2ce9a64032c85f057f195

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