Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb294c26c0f46f7e…

MALICIOUS

PDF

38.3 KB Created: 2020-03-27 07:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0cd8b5acbb2267eb0e2486717ba37b1c SHA-1: aaffb2f121e88e7ab75ff4590ac8218e88924f8d SHA-256: cb294c26c0f46f7e17e01a76446983da2a69b21e1364b50beb48e8858af77e7c
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or directing users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains text related to creating an educational portfolio, suggesting a lure to disguise the malicious intent of linking to external content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://lyfelinescertificationandstaffing.net/uploads/1/3/0/6/130639404/130639404.html#como+elaborar+un+portafolio+educativo
    • http://2handsstudio.net/uploads/1/3/0/8/130813953/ruturalos.pdf
    • http://artbybelen.com/uploads/1/3/0/8/130814021/1758196.pdf
    • http://cardinalrealtyllc.com/uploads/1/3/0/3/130313157/jukopefeji_jikegudezofakig_rupibubolo_turamunukoz.pdf
    • http://getmoorestyle.com/uploads/1/3/0/9/130969270/7fe754054a32805.pdf
    • http://sckatelynham.com/uploads/1/3/0/7/130738835/kesop.pdf
    • http://forums.lifesmysticaljourney.com/uploads/1/3/0/8/130814976/fosabatamufeje.pdf
    • http://quality1stwindowcleaning.com/uploads/1/3/0/2/130270847/7391054.pdf
    • http://brooklyncleargates.com/uploads/1/3/0/5/130538836/gamoxomedowo.pdf
    • http://eddie-ieong.com/uploads/1/3/0/6/130639860/xesor.pdf
    • http://stratakit.com/uploads/1/3/0/2/130291493/nerug_fagik_lazaxogulugoram.pdf
    • http://breederseed.com/uploads/1/3/0/6/130604254/2785241.pdf
    • http://kuskokwimcrossfit.com/uploads/1/3/0/5/130551247/sekabixilona-xurodu.pdf
    • http://abilabra.com/uploads/1/3/0/7/130740259/658422.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_off00006c8f.bin
12b8b6afebbd2523c9c71ddf0e6945e840604e5ad6350b90a0b7e9be7446e677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 8220 bytes

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