Malicious PDF — malware analysis report

Static analysis result for SHA-256 5596ff2feaecbaf7…

MALICIOUS

PDF

73.8 KB Created: 2021-05-28 20:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 43aa984c77ddc9772447781d61dd4662 SHA-1: 2b6c6096493dfac125a0aeaae77e9da2b632f978 SHA-256: 5596ff2feaecbaf7e1951736921663974d3a90c9935c1e76eec6b23dd8bd7ce8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The embedded URL `https://mezovuduw.ru/strik?utm_term=que+es+un+acto+de+habla` is particularly suspicious and likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=que+es+un+acto+de+habla PDF link annotation
    • https://motapesuna.weebly.com/uploads/1/3/4/7/134749044/1734309.pdfIn PDF document text
    • https://nenopejir.weebly.com/uploads/1/3/4/6/134603535/duvulifazutamuras.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_5ff59375af015.pdfIn PDF document text
    • https://derufobi.weebly.com/uploads/1/3/2/6/132682106/piduzeguba_bojoludomixu.pdfIn PDF document text
    • https://muvaxajipafe.weebly.com/uploads/1/3/5/3/135313420/28a302.pdfIn PDF document text
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/vadifevobiligefo.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/vamivaxinabatiki.pdfIn PDF document text
    • https://kizuwapeputatu.weebly.com/uploads/1/3/4/3/134375201/xowuxujufovibin_mitoxamekej.pdfIn PDF document text
    • https://wafitaweligu.weebly.com/uploads/1/3/4/5/134587259/nesoralobejo.pdfIn PDF document text
    • https://tusubolamofe.weebly.com/uploads/1/3/5/3/135322079/zumobivut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423145/normal_6056a7e57ca37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486994/normal_60562efc86624.pdfIn PDF document text
    • https://pekizexigobuton.weebly.com/uploads/1/3/0/8/130815014/ribekoga_sariz.pdfIn PDF document text
    • https://zupikadi.weebly.com/uploads/1/3/4/6/134667234/bavufirelogugagux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5fc70ea8945bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6052df39d9ac0.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/716dea28-3e5d-405e-9ee3-fe45cfc1324f/october_1987_stock_market_crash_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed82e80d-0384-4182-86b0-4fca7772780b/similarities_and_differences_between_romeo_and_juliet_play_and_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb7201c-c369-4eee-ba2a-a6708e1738ff/verizon_fios_tech_support_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f356a62-bfef-427f-8221-1ac99c600120/kipunumojafi.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_off0000e1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D5 5132 bytes
SHA-256: 75e77ec247bf378bcf4d5f94c39dda362634f503f4a9c1d5ef3020119f59c431
font_01_sfnt_off0000f33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 11932 bytes
SHA-256: 2f346fc79a1ae93985011a57e12e39dc0e7fe0ca289e5b8350214b249320cf27