Malicious PDF — malware analysis report

Static analysis result for SHA-256 077d96da01c6092a…

MALICIOUS

PDF

80.2 KB Created: 2021-04-05 20:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3186926adb7363f787b4e929ebee12e9 SHA-1: 401cde9edded52f9cc333210db6eaaebc1387233 SHA-256: 077d96da01c6092aa2543f5279d95b3ed91bad833e11553a2e3d93c72432a377
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/award?keyword=catecismo+infantil+ilustrado+pdf PDF link annotation
    • http://legionmone.xyz/convert_ipynb_to_py_jupyter_lab1vq16.pdfIn PDF document text
    • https://xizimojagetotom.weebly.com/uploads/1/3/3/9/133997363/lunurabera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_60251c441acec.pdfIn PDF document text
    • https://libonatelizipo.weebly.com/uploads/1/3/5/3/135326144/kirudefon.pdfIn PDF document text
    • https://vivusujode.weebly.com/uploads/1/3/2/6/132682813/4902713.pdfIn PDF document text
    • http://bloomwithdeanna.com/813696615756277g.pdfIn PDF document text
    • https://xadafujivesa.weebly.com/uploads/1/3/1/3/131397927/358168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_6069c455acac4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5ff756b616b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_604ec7417f2b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_604f3246709f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_603747c3177b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422628/normal_6054db53c0bc5.pdfIn PDF document text
    • https://jodaraloka.weebly.com/uploads/1/3/4/7/134761764/xegesapefebotaz_wedekotumudito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_5fe0356c5ec3f.pdfIn PDF document text
    • http://ubsvp.com/xuzosukozaluwujuxoxj6o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_60288ead9eb77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_6064cac2ce823.pdfIn PDF document text
    • https://jepukarebav.weebly.com/uploads/1/3/5/3/135321711/mujopo_firutake_vuwifuxefabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwasebax.epizy.com/65552810866.pdfIn PDF document text
    • http://posijibanif.epizy.com/sopupeviferimelo.pdfIn PDF document text
    • http://lodanije.epizy.com/put_simple_past_tense_form.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 5208 bytes
SHA-256: 34d31fb342b5cce645768809f10a79c8894baf8fdf8372ade95024fac911dc97
font_01_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 11464 bytes
SHA-256: c6d348fabb5b897d6dcb733361e25d045e6f421d2e75bc4a2d68c99a1a981916

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