Malicious PDF — malware analysis report

Static analysis result for SHA-256 c451081e1db10855…

MALICIOUS

PDF

38.1 KB Created: 2020-05-19 05:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b2a0d30460ef57e4a6fa2cc5f09ea7a SHA-1: 094c21b995a80bc014701cfbec96bc56d95be0b3 SHA-256: c451081e1db10855e5e5cb241cd71af872bc2392fa7064cf9ba03d68ba3c22a1
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains the title 'Principales modelos de la inteligencia emocional' and references to wkhtmltopdf, suggesting a lure document. The primary attack pattern involves directing users to a vast network of linked PDFs hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://thehappygirlstore.com/uploads/1/3/1/4/131453907/131453907.html#principales+modelos+de+la+inteligencia+emocional
    • http://hydroiv.org/uploads/1/3/0/8/130814195/getut.pdf
    • http://topplerocks.com/uploads/1/3/0/7/130738616/6628330.pdf
    • http://bluelambinsurance.com/uploads/1/3/0/4/130489523/bidip-polefetiwozir-bomidoribax-vezus.pdf
    • http://jonahgreenphotography.com/uploads/1/3/0/5/130590096/b661fdc5412f44f.pdf
    • http://bfortrustee.com/uploads/1/3/0/4/130488169/5276630.pdf
    • http://nickstasiak.com/uploads/1/3/0/8/130874122/kujorove.pdf
    • http://nshoilpurifier.com/uploads/1/3/1/4/131436978/nasomoforagokumatub.pdf
    • http://cheftonysfoodtruck.com/uploads/1/3/0/2/130289400/8913404.pdf
    • http://wantong-stitech.com/uploads/1/3/0/5/130539696/8948448.pdf
    • http://castillolmt.com/uploads/1/3/0/6/130639534/goteremisojisa_tobuvoza.pdf
    • http://oliverhenrycinematography.com/uploads/1/3/0/7/130775763/c92df7562.pdf
    • http://hoodoohemp.com/uploads/1/3/0/8/130873912/tuzelilizulikewet.pdf
    • http://mermaid.marketing/uploads/1/3/1/8/131855992/2027785.pdf
    • http://ideavoo.com/uploads/1/3/1/4/131455024/2616669.pdf
    • http://cookiesforchrist.net/uploads/1/3/1/3/131378776/9630653.pdf
    • http://cheqflagauto.com/uploads/1/3/0/5/130588545/sukakati_lowegovexesanaz_xupomel_kunipimuvofi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006739.bin
c56e1685be02c71c6ea3e9001bb99629f71126587bb7a19b8a978bac657a10da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 11048 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.