Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c5d6f8f592a78b…

MALICIOUS

PDF

46.0 KB Created: 2020-07-07 12:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: e3ab9d2ca512ba65dc4dc1d53a135cb5 SHA-1: 38d56f3916b506c9fbbfd731296667853543109c SHA-256: 60c5d6f8f592a78b70f130de1ad939408666a06e7e24b46e3937d3d26985d510
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm. One of the primary links directs to a known malicious redirector, indicating a likely attempt to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/wb?keyword=codice%20deontologico%20infermieri%202019%20pdf#codice+deontologico+infermieri+2019+pdf In PDF document text
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdfIn PDF document text
    • http://files.connallyband.com/uploads/1/3/1/8/131856381/koguwoxixude.pdfIn PDF document text
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdfIn PDF document text
    • http://files.proyecto1867.com/uploads/1/3/2/3/132302913/mozolejemi-vexiramiga-leselu.pdfIn PDF document text
    • http://files.exmouthcaninecentre.co.uk/uploads/1/3/0/8/130874128/jenasaj.pdfIn PDF document text
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdfIn PDF document text
    • http://files.fccwareham.org/uploads/1/3/2/7/132740860/4414195.pdfIn PDF document text
    • http://files.mtviewcrc.org/uploads/1/3/1/8/131871515/dofebekuwosuxoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kegezagen.files.wordpress.com/2020/07/xiwokixinoxedulizomudot.pdfIn PDF document text
    • https://kikibok.files.wordpress.com/2020/06/dogelezawitizoxalibafez.pdfIn PDF document text
    • https://keganuforuro.files.wordpress.com/2020/06/wutixoxejexexugemumiwitu.pdfIn PDF document text
    • https://wisixabapux.files.wordpress.com/2020/07/46572727996.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_off0000761b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 5380 bytes
SHA-256: ea8eee4aab91c2ddbc91a67616f80bb8a8a4f065faa49876b535e9e11800af76
font_01_sfnt_off00008857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8857 10340 bytes
SHA-256: 56eab9313d6a870825e8bfb861210b64fe713548b267b37fa8380e8743f418c2

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