Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2349a3b6dbd31b…

MALICIOUS

PDF

76.7 KB Created: 2021-06-02 18:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 882393e9cb186e23d9b2efc47776a544 SHA-1: 14dd67b792a277599ada7fcad5dce039923bee51 SHA-256: 4a2349a3b6dbd31b61bc3d37a7adedf8f2dfcde7d17c94a57b4fef2e32f590c6
206 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though malformed, appears to be a lure related to toy vacuum cleaner instructions, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://allytemp.ru/pbw?utm_term=casdon+dyson+toy+ball+vacuum+cleaner+instructions PDF link annotation
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/e838d606d975.pdfIn PDF document text
    • https://fifilukativoj.weebly.com/uploads/1/3/4/5/134509223/667034.pdfIn PDF document text
    • https://mabedokuk.weebly.com/uploads/1/3/4/5/134582143/9443459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_605f31169b6c5.pdfIn PDF document text
    • https://xadiditenir.weebly.com/uploads/1/3/4/7/134763486/jetuk.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/2389471.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/8247333.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5fec2071f0c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_60395bbb9ec09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_603682be16c89.pdfIn PDF document text
    • https://vikuxujawud.weebly.com/uploads/1/3/4/5/134515409/pagega.pdfIn PDF document text
    • https://waneratamif.weebly.com/uploads/1/3/1/4/131436972/vidirunepag-xinelu-walafitixolut-folakanebuzudog.pdfIn PDF document text
    • https://sagudazotimoja.weebly.com/uploads/1/3/4/7/134753003/1513016.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/vopegede.pdfIn PDF document text
    • https://mopepeserowote.weebly.com/uploads/1/3/4/6/134621402/7612241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusavivo.pbworks.com/f/papazarojiwa.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144411681/how_to_mix_salt_reef_tank.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144471543/xebajiju.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/introduccion_a_la_metalurgia_fisica_avner_slideshare.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144413367/63768518767.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/danagawasuregenal.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/libro_de_quimica_organica_wade_volumen_2.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144508959/80928361330.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_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 5292 bytes
SHA-256: ba3c0deeeaaf28832efe4d4e5f9fd49bec1c1b95a730eff2084d9a84f1ff2d78
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 10828 bytes
SHA-256: 00f681f53afad1eff8e51e68c65cd741474fd8c82867d2a68e4368d9df3a1de4