Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e646c9fb5541b1…

MALICIOUS

PDF

79.6 KB Created: 2021-04-26 23:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: acb51f5b53f5116e047a0b3ca165c50b SHA-1: a1e80f29578cb997f8b451766384bfc247b238ac SHA-256: 03e646c9fb5541b18fa8fac1966a31f9b22f5581ea9e9ff28935bef989c00890
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to various external websites under the guise of search results for 'weed eater lawn tractor for sale'. The presence of numerous external links, many hosted on disposable domains, and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malicious redirection campaign.

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://lozipotod.ru/strik?utm_term=weed+eater+lawn+tractor+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413126/normal_604a21a8c6a67.pdfIn PDF document text
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/cab108f9fb15d0.pdfIn PDF document text
    • http://vulifux.66ghz.com/applied_operation_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_601299cccbaa6.pdfIn PDF document text
    • https://walikuroxora.weebly.com/uploads/1/3/2/8/132815001/1360910.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/f1af30a7.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/00c1934dcb22d36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fc9a73b47f57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405639/normal_600517a9dc391.pdfIn PDF document text
    • http://useplafond.xyz/pentair_kreepy_krauly_prowler_820_robotic_pool_cleanerf1zag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_606ba7934ac24.pdfIn PDF document text
    • http://maewallace.com/canon_pixma_mg3520_software_download_for_macdxopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_6032f7e6bb1cc.pdfIn PDF document text
    • https://mexilaret.weebly.com/uploads/1/3/0/7/130775974/mixizek.pdfIn PDF document text
    • https://dobamadolexazi.weebly.com/uploads/1/3/4/4/134478964/nanupuri_bijerixuwod_falozowe_xusek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_60496f35770e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5fe52de28d014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxokumixopo.epizy.com/adenoma_hipofisario_pediatria.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_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 5120 bytes
SHA-256: 2a6fbaa5ba91189bc92961953703e9ebb69a643e778f51eef10af2f4defabeb9
font_01_sfnt_off00010af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF7 10808 bytes
SHA-256: 4e6686f618dffe2c162237990b0293c855bbd662b7d1c81071246f1c1cd7cbfb

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