Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cc1c2c6bd0eef3…

MALICIOUS

PDF

85.8 KB Created: 2021-04-01 03:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e08e1bcfcfa77e6624c422e2e4180eee SHA-1: 2f48f77c8be84399826242e7ff15f88d885343e3 SHA-256: 02cc1c2c6bd0eef31e38fae57e70fafd82a59d90a560358cf1b303eee9f5be36
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high probability of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm designed to distribute malicious content or phish users. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/123?utm_term=free+powerpoint+templates+with+animation+3d PDF link annotation
    • https://zemotererozo.weebly.com/uploads/1/3/0/7/130738962/likutevazuzivilu.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/5da83ce38c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454048/normal_5ff85b29007af.pdfIn PDF document text
    • https://senidexug.weebly.com/uploads/1/3/0/7/130775540/lumebepuje-ripebilezi.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/25805086956.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/palabras_gramaticales.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5fe7ff8e1a12c.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/gunoviviwoganakitowe.pdfIn PDF document text
    • https://jikabokuw.weebly.com/uploads/1/3/4/6/134658058/354986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487005/normal_60128438436ce.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/toshiba_lcd_colour_tv_32_inch.pdfIn PDF document text
    • https://nojokubovurob.weebly.com/uploads/1/3/1/6/131606526/4707390.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/convert_to_ms_word_file_online_free.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/52046057504.pdfIn PDF document text
    • https://saripubisopa.weebly.com/uploads/1/3/5/3/135322362/c7ceac8db6590f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_6038d6975a228.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/4f43f1068bad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/20003083179.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/algebra_age_word_problems_worksheet.pdfIn PDF document text
    • http://pawuzax.onlinewebshop.net/in_vitro_carrageenan.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/zuxawulowunafovazo.pdfIn PDF document text
    • http://jukasuxoseki.atwebpages.com/mopixowojidilunuzapo.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/tamil_nadu_register_office_guideline_value.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/heavier_than_heaven_espaol_gratis.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_off000112a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A8 5412 bytes
SHA-256: 7702a5ecc129dea43bd91b3cfd3734dcc41c15f9bb0a3a2af987f77e274736a7
font_01_sfnt_off000124f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F0 10716 bytes
SHA-256: 2685252e263dddf38df880e1c36fb6bdf1139b8fba642e7a9a2022b493bc0764