Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5eb9bfb445a49a…

MALICIOUS

PDF

348.2 KB Created: 2020-04-08 02:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 10b32c0fcab2aab28321ac6a0890b15d SHA-1: 1f8ee3bfd24c0118fe52c3dffc74a467a3ec913c SHA-256: ef5eb9bfb445a49a49d2ce4f784b2bca2953dad761683665fa5c284ead85237d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs that lead to other PDF files, suggesting a multi-stage attack or a distribution mechanism for further malicious content. The heuristic 'SE_TRAVEL_SUPPORT_PHONE_SCAM' indicates a significant number of phone numbers stuffed into the document, likely as part of a social engineering lure to trick users into calling for support or making fraudulent bookings. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4038

Heuristics 4

  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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 http://stephblair.com/uploads/1/3/0/3/130313087/130313087.html#deadliest+catch+episode+guide+season+14 PDF link annotation
    • http://cristofori.online/uploads/1/3/1/4/131408369/vudukoveda_nejobubadi_topifapizuma_ralita.pdfIn PDF document text
    • http://anchomundo-editores.com/uploads/1/3/0/7/130775458/manup-damamuzigotubav-nixevoduxab.pdfIn PDF document text
    • http://28daycharitychallenge.com/uploads/1/3/0/5/130538869/2203915.pdfIn PDF document text
    • http://lechiclubbock.com/uploads/1/3/0/8/130813644/ffa285f328d17.pdfIn PDF document text
    • http://janeschleppenbachart.com/uploads/1/3/0/5/130589115/28dd917bd8f96.pdfIn PDF document text
    • http://lowcostphotobooths.co.uk/uploads/1/3/1/3/131382590/zamosuwem.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D35 9592 bytes
SHA-256: 77e42600e9fa98f9c9ec9161dfa6b518668b4def6ee665eb47276b51d5ab484e

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