Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c18ee660d2a711b…

MALICIOUS

PDF

73.0 KB Created: 2021-02-16 22:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c7fbc88bf60678863dae6cbac1bbc79e SHA-1: db184fedb17e51986aee62c3a26fbc50eb22ec1d SHA-256: 1c18ee660d2a711bf8f65bce8983d63a9be3af5bfe29435fd49658b4ee90146c
186 Risk Score

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://baarspo.ru/wix?keyword=z+for+zachariah+full+book+pdf PDF link annotation
    • https://rowigoto.weebly.com/uploads/1/3/0/8/130813427/3ea9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fd2c728d2481.pdfIn PDF document text
    • https://sanexopapodepal.weebly.com/uploads/1/3/0/7/130739353/dugexujolot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_601252bbb25a2.pdfIn PDF document text
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/adce1e.pdfIn PDF document text
    • https://sorefumegevori.weebly.com/uploads/1/3/1/8/131871670/8671152.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/1530924.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/VN8gcjg/xizesiwetinikeme.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/02e06738e802.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/4712000.pdfIn PDF document text
    • https://vojumemij.weebly.com/uploads/1/3/4/4/134473557/c45bc91971055a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/fagonumizumogegotubabe.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/28584999616.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/38334298841.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_off0000e31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31B 5276 bytes
SHA-256: 3fb89137977c715de80336e89655f16f95ec03700019a7b6737797129b8f8f0c
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10000 bytes
SHA-256: e5d5e0e57139b2d4230bb3d513e3f487b38fdc2c9e56842047b0c522f7d3b7ec

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