Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bb99fec02f667c…

MALICIOUS

PDF

38.6 KB Created: 2020-03-22 02:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 11d7e5c6901526aead46593d3095edc4 SHA-1: 6227d99e4e71eccf0761bda353f642a491617f6d SHA-256: 24bb99fec02f667cceb1577b7dd463d7428eefad7db5567824a90695fd0038b7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The document body explicitly mentions 'Halo 2 installer free download for pc', indicating a lure to download potentially unwanted or malicious software. The presence of a 'LOLBin Run Command' heuristic firing suggests that the document may also contain instructions for executing commands via Windows scripting tools, likely to facilitate the download and execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://irieint.com/uploads/1/3/0/6/130639419/130639419.html#halo+2+installer+free+download+for+pc PDF link annotation
    • http://curleyscience.com/uploads/1/3/0/3/130379307/e3c6e.pdfIn PDF document text
    • http://quantumbeveragegroup.com/uploads/1/3/0/5/130543173/tulasabitudawofopup.pdfIn PDF document text
    • http://newbeginningsinvestorsllc.com/uploads/1/3/0/6/130620728/wagewalamorim_jedivedo_misavidelaru_sawem.pdfIn PDF document text
    • http://lilahidalgo.info/uploads/1/3/0/5/130589128/9368316dd8df16.pdfIn PDF document text
    • http://naturecoastwedding.com/uploads/1/3/0/5/130550794/331f90efd81f61.pdfIn PDF document text
    • http://riverwrynn.com/uploads/1/3/1/1/131163760/nijorulevadenimev.pdfIn PDF document text
    • http://clazs.com/uploads/1/3/0/7/130738639/a8a95a9b6db.pdfIn PDF document text
    • http://whisperingwillowsalpacas.net/uploads/1/3/0/8/130813798/e4f5e6a49dc5.pdfIn PDF document text
    • http://elegancelights.com/uploads/1/3/0/5/130539042/61349.pdfIn PDF document text
    • http://livingcleanshop.com/uploads/1/3/0/7/130775251/d29ead33ed41.pdfIn PDF document text
    • http://hooknchain.com/uploads/1/3/0/6/130639626/2354040.pdfIn PDF document text
    • http://yoniwidesign.com/uploads/1/3/0/8/130813420/rovizojarujejil.pdfIn PDF document text
    • http://acc-guhotelandconferencecenter.com/uploads/1/3/0/6/130605010/sakexevivibibof.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 1

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_off00006ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE4 8424 bytes
SHA-256: a0db61681c704a9e6f4c4408c3662c7f5cbf3fe8b1cb8473d5719ffcdf24de34

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